Removed the code that prevented transports from spawning based on player state.

Since it now gives you money if you're not able to power up, there's
no point in preventing it from spawning when you can't power up.

src/alien.cpp

@@ -794,10 +794,7 @@ bool alien_add()
 				randEnemy = CD_SLAVETRANSPORT;
 		}
 
-		if ((currentGame.area != MAX_MISSIONS - 1) &&
-			((currentGame.maxPlasmaRate > currentGame.minPlasmaRate) ||
-				(currentGame.maxPlasmaOutput > currentGame.minPlasmaOutput) ||
-				(currentGame.maxPlasmaDamage > currentGame.minPlasmaDamage)))
+		if (currentGame.area != MAX_MISSIONS - 1)
 		{
 			if ((rand() % 6) == 0)
 				randEnemy = CD_TRANSPORTSHIP;