- moved the 'no player start' check to the end of G_DoLoadLevel because inside G_FinishTravel it would leave some data in undefined places that later can cause a crash.

src/p_udmf.cpp

@@ -2073,6 +2073,7 @@ public:
 			else if (sc.Compare("sector"))
 			{
 				sector_t sec;
+				memset(&sec, 0, sizeof(sector_t));
 				ParseSector(&sec, ParsedSectors.Size());
 				ParsedSectors.Push(sec);
 			}