(svn r1826) -Feature: a brand new OldLoader so OpenTTD is TTD(Patch) compatible

again.. kind of anyway. Still needs work for the extra chunks 
   TTDPatch provides, and which we use too, but not in the same way..
 - Also, no longer BE is a problem, reading is BE/LE safe. 
 - Tnx to Bjarni for the BE testing, Tron for the help on the BE, 
   Darkvater for helping out, and Mek for providing me with the correct 
   information regarding TTDPatch savegames

debug.c

@@ -12,6 +12,7 @@ int _debug_misc_level;
 int _debug_ms_level;
 int _debug_net_level;
 int _debug_spritecache_level;
+int _debug_oldloader_level;
 
 
 void CDECL debug(const char *s, ...)
@@ -46,7 +47,8 @@ void SetDebugString(const char *s)
 		DEBUG_LEVEL(misc),
 		DEBUG_LEVEL(ms),
 		DEBUG_LEVEL(net),
-		DEBUG_LEVEL(spritecache)
+		DEBUG_LEVEL(spritecache),
+		DEBUG_LEVEL(oldloader)
 	};
 	#undef DEBUG_LEVEL
 

debug.h

@@ -13,6 +13,7 @@
 	extern int _debug_ms_level;
 	extern int _debug_net_level;
 	extern int _debug_spritecache_level;
+	extern int _debug_oldloader_level;
 #endif
 
 void CDECL debug(const char *s, ...);