Fix vision staying behind from where you eited the level

This could be either the stairs one tile next to where you enter. Or a
compleatly different posistion if using a different entry point.

Source/loadsave.cpp

@@ -1724,6 +1724,8 @@ void SaveLevel()
 	int dwLen;
 	BYTE *SaveBuff;
 
+	DoUnVision(plr[myplr]._px, plr[myplr]._py, plr[myplr]._pLightRad); // fix for vision staying on the level
+
 	if (currlevel == 0)
 		glSeedTbl[0] = GetRndSeed();