[Fix] FixHeading Infinite Loop Fix (#4854)

Co-authored-by: KimLS <KimLS@peqtgc.com>

zone/mob_movement_manager.cpp

@@ -933,16 +933,11 @@ void MobMovementManager::SendCommandToClients(
 
 float MobMovementManager::FixHeading(float in)
 {
-	auto h = in;
-	while (h > 512.0) {
-		h -= 512.0;
+	int h = static_cast<int>(in) % 512;
+	if (h < 0) {
+		h += 512;
 	}
-
-	while (h < 0.0) {
-		h += 512.0;
-	}
-
-	return h;
+	return static_cast<float>(h);
 }
 
 void MobMovementManager::DumpStats(Client *client)