* Updated to ZDoom r3487:

- Use 64-bit coordinates for a few spots in the FPathTraverse constructor and P_SightPathTraverse().
- Allow FTraceInfo::TrlaceTraverse to pass the endpoints to FPathTraverse as deltas instead of as absolute coordinates.
- Replace >>MAPBLOCKSHIFT with GetSafeBlockX/GetSafeBlockY from Mocha Doom.
- Fixed: Use buggy PointOnSide for respawning monsters too.

git-svn-id: http://mancubus.net/svn/hosted/gzdoom/trunk@1325 b0f79afe-0144-0410-b225-9a4edf0717df

src/p_setup.cpp

@@ -164,6 +164,8 @@ int				*blockmaplump;	// offsets in blockmap are from here
 
 fixed_t 		bmaporgx;		// origin of block map
 fixed_t 		bmaporgy;
+int				bmapnegx;		// min negs of block map before wrapping
+int				bmapnegy;
 
 FBlockNode**	blocklinks;		// for thing chains
 
@@ -2960,10 +2962,15 @@ void P_LoadBlockMap (MapData * map)
 
 	}
 
-	bmaporgx = blockmaplump[0]<<FRACBITS;
-	bmaporgy = blockmaplump[1]<<FRACBITS;
+	bmaporgx = blockmaplump[0] << FRACBITS;
+	bmaporgy = blockmaplump[1] << FRACBITS;
 	bmapwidth = blockmaplump[2];
 	bmapheight = blockmaplump[3];
+	// MAES: set blockmapxneg and blockmapyneg
+	// E.g. for a full 512x512 map, they should be both
+	// -1. For a 257*257, they should be both -255 etc.
+	bmapnegx = bmapwidth > 255 ? bmapwidth - 512 : -257;
+	bmapnegy = bmapheight > 255 ? bmapheight - 512 : -257;
 
 	// clear out mobj chains
 	count = bmapwidth*bmapheight;