(svn r15513) -Cleanup: Unavailable varaction variable value does not matter, but at least it can be consistent.

src/newgrf_canal.cpp

@@ -56,7 +56,7 @@ static uint32 CanalGetVariable(const ResolverObject *object, byte variable, byte
 	DEBUG(grf, 1, "Unhandled canal property 0x%02X", variable);
 
 	*available = false;
-	return 0;
+	return UINT_MAX;
 }
 
 

src/newgrf_cargo.cpp

@@ -31,7 +31,7 @@ static uint32 CargoGetVariable(const ResolverObject *object, byte variable, byte
 	DEBUG(grf, 1, "Unhandled cargo property 0x%X", variable);
 
 	*available = false;
-	return 0;
+	return UINT_MAX;
 }
 
 

src/newgrf_generic.cpp

@@ -94,7 +94,7 @@ static uint32 GenericCallbackGetVariable(const ResolverObject *object, byte vari
 	DEBUG(grf, 1, "Unhandled generic feature property 0x%02X", variable);
 
 	*available = false;
-	return 0;
+	return UINT_MAX;
 }
 
 

src/newgrf_industries.cpp

@@ -380,7 +380,7 @@ uint32 IndustryGetVariable(const ResolverObject *object, byte variable, byte par
 	DEBUG(grf, 1, "Unhandled industry property 0x%X", variable);
 
 	*available = false;
-	return (uint32)-1;
+	return UINT_MAX;
 }
 
 static const SpriteGroup *IndustryResolveReal(const ResolverObject *object, const SpriteGroup *group)

src/newgrf_industrytiles.cpp

@@ -102,7 +102,7 @@ static uint32 IndustryTileGetVariable(const ResolverObject *object, byte variabl
 	DEBUG(grf, 1, "Unhandled industry tile property 0x%X", variable);
 
 	*available = false;
-	return (uint32)-1;
+	return UINT_MAX;
 }
 
 static const SpriteGroup *IndustryTileResolveReal(const ResolverObject *object, const SpriteGroup *group)

src/newgrf_town.cpp

@@ -95,5 +95,5 @@ uint32 TownGetVariable(byte variable, byte parameter, bool *available, const Tow
 	DEBUG(grf, 1, "Unhandled town property 0x%X", variable);
 
 	*available = false;
-	return (uint32)-1;
+	return UINT_MAX;
 }