Initialize level data with 0s in M&P

Following discussion on TerryCavanagh/VVVVVV#153, I suggested that
instead of reverting my M&P guards from TerryCavanagh/VVVVVV#124 (which
would only revert it for The Final Level, The Lab, Overworld, and The
Tower, leaving Space Station 1 & 2 and The Warp Zone alone which could
potentially cause the same problem that motivated
TerryCavanagh/VVVVVV#153), we should initialize the map data with 0s
instead.

desktop_version/src/Finalclass.cpp

@@ -2314,6 +2314,12 @@ std::vector<std::string> finalclass::loadlevel(int rx, int ry, Game& game, entit
 		//game.test = true;
 		//game.teststring = "ERROR: Map not found in Final Area";
 		break;
+#else
+	default:
+		for (int j = 0; j < 30; j++)
+		{
+			tmap.push_back("0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0");
+		}
 #endif
 	}