(svn r1302) -Fix: [ 1091655 ] In some older maps somehow water is owned by

OWNER_NONE instead of OWNER_WATER.
-Fix: On InitializeLandscape the map was made MP_WATER, but OWNER_NONE. 
 When ConvertGroundTilesIntoWaterTiles() is not called, this gives big 
 problems (see above). Now the owner is set to OWNER_WATER by default.

landscape.c

@@ -483,7 +483,7 @@ void InitializeLandscape()
 	uint map_size = MapSize();
 	int i;
 
-	memset(_map_owner, OWNER_NONE, map_size);
+	memset(_map_owner, OWNER_WATER, map_size);
 	memset(_map2, 0, map_size * sizeof(uint16));
 	memset(_map3_lo, 0, map_size);
 	memset(_map3_hi, 0, map_size);