- Fixed: The HIRESTEX parser didn't check if a graphic specified in a remap

command actually existed.
- Fixed: My $Limit fix from yesterday didn't work because NearLimit was
  an unsigned byte and the comparisons with -1 didn't work. Made it a
  signed word instead.
- Made sfxinfo_t::Link an unsigned int because it limited the amount of 
  usable sounds to 65535. 

SVN r869 (trunk)

src/textures/texture.cpp

@@ -79,6 +79,7 @@ FTexture * FTexture::CreateTexture (int lumpnum, int usetype)
 		{ FAutomapTexture::Check,	FAutomapTexture::Create,	TEX_Autopage },
 	};
 
+	if (lumpnum == -1) return NULL;
 
 	FWadLump data = Wads.OpenLumpNum (lumpnum);