Fixed a bunch of MSVS warnings

* Possibly also fixed some bugs with pathfinding and TNT, though
unlikely

src/Blocks/BlockButton.h

@@ -88,7 +88,7 @@ public:
 			default:
 			{
 				ASSERT(!"Unhandled block meta!");
-				return BLOCK_FACE_NONE;
+				return 0;
 			}
 		}
 	}