Fix possible infinite loop

Possibility of an exploiter killing an enemy and disconnecting within the `wait` window to trigger an infinite loop.

GameFiles/AntiCheat/PT6/storage/t6/scripts/mp/_customcallbacks.gsc

@@ -143,6 +143,8 @@ waitForFrameThread()
 
 waitForAdditionalAngles( logString, beforeFrameCount, afterFrameCount )
 {
+	self endon( "disconnect" );
+
 	currentIndex = self.currentAnglePosition;
 	wait( 0.05 * afterFrameCount );
 
@@ -260,4 +262,4 @@ Callback_PlayerDisconnect()
 {
 	level notify( "disconnected", self );
 	self [[maps\mp\gametypes\_globallogic_player::callback_playerdisconnect]]();
-}
+}