fix misc. errors reported by clang static analyzer

src/client/DownloadManager.cpp

@@ -59,7 +59,7 @@ void DownloadManager::Start()
 
 void DownloadManager::Update()
 {
-	unsigned int numActiveDownloads;
+	unsigned int numActiveDownloads = 0;
 	while (!managerShutdown)
 	{
 		pthread_mutex_lock(&downloadAddLock);

src/graphics/Graphics.cpp

@@ -734,33 +734,6 @@ int Graphics::CharIndexAtPosition(char *s, int positionX, int positionY)
 }
 
 
-int Graphics::textposxy(char *s, int width, int w, int h)
-{
-	int x=0,y=0,n=0,cw, wordlen, charspace;
-	while (*s)
-	{
-		wordlen = strcspn(s," .,!?\n");
-		charspace = textwidthx(s, width-x);
-		if (charspace<wordlen && wordlen && width-x<width/3)
-		{
-			x = 0;
-			y += FONT_H+2;
-		}
-		for (; *s && --wordlen>=-1; s++)
-		{
-			cw = font_data[font_ptrs[(int)(*(unsigned char *)s)]];
-			if ((x+(cw/2) >= w && y+6 >= h)||(y+6 >= h+FONT_H+2))
-				return n++;
-			x += cw;
-			if (x>=width) {
-				x = 0;
-				y += FONT_H+2;
-			}
-			n++;
-		}
-	}
-	return n;
-}
 int Graphics::textwrapheight(char *s, int width)
 {
 	int x=0, height=FONT_H+2, cw;

src/graphics/Graphics.h

@@ -211,7 +211,6 @@ public:
 	static int textnwidth(char *s, int n);
 	static void textnpos(char *s, int n, int w, int *cx, int *cy);
 	static int textwidthx(char *s, int w);
-	static int textposxy(char *s, int width, int w, int h);
 	static int textwrapheight(char *s, int width);
 	static int textwidth(const char *s);
 	static void textsize(const char * s, int & width, int & height);

src/graphics/Renderer.cpp

@@ -95,7 +95,7 @@ void Renderer::RenderBegin()
 	{
 		std::copy(persistentVid, persistentVid+(VIDXRES*YRES), vid);
 	}
-	pixel * oldVid;
+	pixel * oldVid = NULL;
 	if(display_mode & DISPLAY_WARP)
 	{
 		oldVid = vid;
@@ -1028,6 +1028,8 @@ void Renderer::render_gravlensing(pixel * source)
 	pixel t;
 	pixel *src = source;
 	pixel *dst = vid;
+	if (!dst)
+		return;
 	for(nx = 0; nx < XRES; nx++)
 	{
 		for(ny = 0; ny < YRES; ny++)
@@ -2361,7 +2363,7 @@ void Renderer::draw_air()
 	float (*hv)[XRES/CELL] = sim->air->hv;
 	float (*vx)[XRES/CELL] = sim->air->vx;
 	float (*vy)[XRES/CELL] = sim->air->vy;
-	pixel c;
+	pixel c = 0;
 	for (y=0; y<YRES/CELL; y++)
 		for (x=0; x<XRES/CELL; x++)
 		{

src/gui/colourpicker/ColourPickerActivity.cpp

@@ -140,7 +140,7 @@ void ColourPickerActivity::OnMouseMove(int x, int y, int dx, int dy)
 	if(valueMouseDown)
 	{
 		x -= Position.X+5;
-		y -= Position.Y+5;
+		//y -= Position.Y+5;
 
 		currentValue = x;
 
@@ -230,7 +230,7 @@ void ColourPickerActivity::OnMouseUp(int x, int y, unsigned button)
 		valueMouseDown = false;
 
 		x -= Position.X+5;
-		y -= Position.Y+5;
+		//y -= Position.Y+5;
 
 		currentValue = x;
 

src/gui/game/GameView.cpp

@@ -332,7 +332,7 @@ GameView::GameView():
 	tagSimulationButton = new ui::Button(ui::Point(currentX, Size.Y-16), ui::Point(227, 15), "[no tags set]", "Add simulation tags");
 	tagSimulationButton->Appearance.HorizontalAlign = ui::Appearance::AlignLeft;
 	tagSimulationButton->SetIcon(IconTag);
-	currentX+=252;
+	//currentX+=252;
 	tagSimulationButton->SetActionCallback(new TagSimulationAction(this));
 	AddComponent(tagSimulationButton);
 
@@ -2433,9 +2433,9 @@ void GameView::OnDraw()
 			fpsInfo << " [REPLACE MODE]";
 		if (c->GetReplaceModeFlags()&SPECIFIC_DELETE)
 			fpsInfo << " [SPECIFIC DELETE]";
-		if (ren->GetGridSize())
+		if (ren && ren->GetGridSize())
 			fpsInfo << " [GRID: " << ren->GetGridSize() << "]";
-		if (ren->findingElement)
+		if (ren && ren->findingElement)
 			fpsInfo << " [FIND]";
 
 		int textWidth = Graphics::textwidth((char*)fpsInfo.str().c_str());

src/gui/search/SearchView.cpp

@@ -466,8 +466,8 @@ void SearchView::NotifyTagListChanged(SearchModel * sender)
 	int savesY = 4, buttonPadding = 1;
 	int buttonAreaHeight, buttonYOffset;
 
-	int tagWidth, tagHeight, tagX = 0, tagY = 0, tagsX = 6, tagsY = 4, tagPadding = 1;
-	int tagAreaWidth, tagAreaHeight, tagXOffset, tagYOffset;
+	int tagWidth = 0, tagHeight = 0, tagX = 0, tagY = 0, tagsX = 6, tagsY = 4, tagPadding = 1;
+	int tagAreaWidth, tagAreaHeight, tagXOffset = 0, tagYOffset = 0;
 
 	vector<pair<string, int> > tags = sender->GetTagList();
 

src/lua/TPTScriptInterface.cpp

@@ -272,8 +272,8 @@ AnyType TPTScriptInterface::tptS_set(std::deque<std::string> * words)
 		throw GeneralException("Invalid property");
 
 	//Selector
-	int newValue;
-	float newValuef;
+	int newValue = 0;
+	float newValuef = 0.0f;
 	if (value.GetType() == TypeNumber)
 	{
 		newValuef = newValue = ((NumberType)value).Value();

src/simulation/elements/PIPE.cpp

@@ -185,7 +185,7 @@ int Element_PIPE::update(UPDATE_FUNC_ARGS)
 			{
 				rndstore = rand();
 				rnd = rndstore&7;
-				rndstore = rndstore>>3;
+				//rndstore = rndstore>>3;
 				rx = pos_1_rx[rnd];
 				ry = pos_1_ry[rnd];
 				if (BOUNDS_CHECK)

src/simulation/elements/STKM.cpp

@@ -143,7 +143,8 @@ int Element_STKM::run_stickman(playerst *playerp, UPDATE_FUNC_ARGS) {
 		rby = 1.0f;
 		tmp = 1.0f;
 	}
-	tmp = 1.0f/sqrtf(rbx*rbx+rby*rby);
+	else
+		tmp = 1.0f/sqrtf(rbx*rbx+rby*rby);
 	rbx *= tmp;// scale to a unit vector
 	rby *= tmp;
 	if (rbLowGrav)