(svn r7616) -Cleanup:

-(re)set _rename_[id/what] to -1 to catch invalid calls (main_gui.c)
 -Only invalidate widget of pause/ff instead of whole window (main_gui.c)
 -Remove numbering from WE_ and WC_ as it's not needed, also remove
  non-existing windowclasses (window.h, openttd.h)
 -Give names to some of the enums (window.h)
 -In UninitWindowSystem not only free malloc'd widgets, but also reset the z-array (window.c)
 -Some coding style, comments, etc.

newgrf.c

@@ -2483,9 +2483,7 @@ static void SafeInfo(byte *buf, int len)
 		info = name + name_len + 1;
 		info_len = ttd_strnlen(info, len);
 
-		if (info_len < len) {
-			_cur_grfconfig->info  = TranslateTTDPatchCodes(info);
-		}
+		if (info_len < len) _cur_grfconfig->info  = TranslateTTDPatchCodes(info);
 	}
 }