bugfix(ai): Fix game crash caused by an AI player not finding a valid Sneak Attack location (#1435)

Author: Stubbjax

GeneralsMD/Code/GameEngine/Source/GameLogic/AI/AIPlayer.cpp

@@ -1244,10 +1244,14 @@ Bool AIPlayer::computeSuperweaponTarget(const SpecialPowerTemplate *power, Coord
 			{
 				cash = curCash;
 				bestPos = pos;
+				success = true;
 			}
 		}
 	}
 
+	if (!success)
+		return false;
+
 	//Fine tune that position by looking at a even smaller radius.
 	Coord3D veryBestPos;
 	xCount = 11;