From 75d5cc3d049a42c63254b4a4810447955398cf22 Mon Sep 17 00:00:00 2001
From: Simon Robertshaw <simon@hardwired.org.uk>
Date: Tue, 26 Apr 2011 16:18:43 +0100
Subject: [PATCH] Fix for non-diff mode

---
 src/air.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/air.c b/src/air.c
index 4e5122c2a..76c6fee34 100644
--- a/src/air.c
+++ b/src/air.c
@@ -56,6 +56,8 @@ void update_grav(void)
 			}
 		}
 	}
+	if(!changed)
+		goto fin;
 	memset(th_gravy, 0, sizeof(th_gravy));
 	memset(th_gravx, 0, sizeof(th_gravx));
 #endif
@@ -65,7 +67,7 @@ void update_grav(void)
 			if (th_ogravmap[i][j] != th_gravmap[i][j])
 			{
 #else
-			if ((th_gravmap[i][j] > 0.0001f || th_gravmap[i][j]<-0.0001f) && changed) //Only calculate with populated or changed cells.
+			if (th_gravmap[i][j] > 0.0001f || th_gravmap[i][j]<-0.0001f) //Only calculate with populated or changed cells.
 			{
 #endif
 				for (y = 0; y < YRES / CELL; y++) {
@@ -85,6 +87,7 @@ void update_grav(void)
 			}
 		}
 	}
+fin:
 	memcpy(th_ogravmap, th_gravmap, sizeof(th_gravmap));
 	memset(th_gravmap, 0, sizeof(th_gravmap));
 }