- allocate the sprite positioning info on demand only.

For most textures this is never needed and it can easily be put in the memory arena being used for image sources.

src/common/textures/image.cpp

@@ -41,7 +41,7 @@
 #include "cmdlib.h"
 #include "palettecontainer.h"
 
-FMemArena FImageSource::ImageArena(32768);
+FMemArena ImageArena(32768);
 TArray<FImageSource *>FImageSource::ImageForLump;
 int FImageSource::NextID;
 static PrecacheInfo precacheInfo;