ICE contains arbitrary elements in ctype as well and should track this in saves

src/client/GameSave.cpp

@@ -59,6 +59,7 @@ void GameSave::MapPalette()
 	}
 	if (version <= Version(98, 2))
 	{
+		ignoreMissingErrors[PT_ICEI] = true;
 		ignoreMissingErrors[PT_SNOW] = true;
 		ignoreMissingErrors[PT_RSST] = true;
 		ignoreMissingErrors[PT_RSSS] = true;

src/simulation/elements/ICEI.cpp

@@ -34,6 +34,7 @@ void Element::Element_ICEI()
 	Description = "Crushes under pressure. Cools down air.";
 
 	Properties = TYPE_SOLID|PROP_LIFE_DEC|PROP_NEUTPASS;
+	CarriesTypeIn = 1U << FIELD_CTYPE;
 
 	LowPressure = IPL;
 	LowPressureTransition = NT;