- Add support for Skulltag ACS IsNetworkGame.

Once known as PlayerOnTeam, then it became IsMultiplayer, but Skulltag code ignored emulated multiplayer, hence the new and clearer name.

src/p_acs.cpp

@@ -8094,6 +8094,10 @@ scriptwait:
 			break;
 
 // [BC] Start ST PCD's
+		case PCD_ISNETWORKGAME:
+			PushToStack(netgame);
+			break;
+
 		case PCD_PLAYERTEAM:
 			if ( activator && activator->player )
 				PushToStack( activator->player->userinfo.GetTeam() );

src/p_acs.h

@@ -504,7 +504,7 @@ public:
 		PCD_PLAYERGOLDSKULL,
 		PCD_PLAYERBLACKCARD,
 		PCD_PLAYERSILVERCARD,
-		PCD_PLAYERONTEAM,
+		PCD_ISNETWORKGAME,
 		PCD_PLAYERTEAM,
 /*120*/	PCD_PLAYERHEALTH,
 		PCD_PLAYERARMORPOINTS,