Change gamestate ints to their enum names

This is to make it easier to read, so I don't have to reference Enums.h
if I want to know what they are referring to.

desktop_version/src/Script.cpp

@@ -1266,7 +1266,7 @@ void scriptclass::run()
 				if (words[1] == "teleporter")
 				{
 					//TODO this draw the teleporter screen. This is a problem. :(
-					game.gamestate = 5;
+					game.gamestate = TELEPORTERMODE;
 					graphics.menuoffset = 240; //actually this should count the roomname
 					if (map.extrarow) graphics.menuoffset -= 10;
 
@@ -1502,7 +1502,7 @@ void scriptclass::run()
 			}
 			else if (words[0] == "rollcredits")
 			{
-				game.gamestate = 6;
+				game.gamestate = GAMECOMPLETE;
 				graphics.fademode = 4;
 				game.creditposition = 0;
 			}