Fixed freezes on controller calling MarkPath() to invalid locations

AdventurePlayerController.cpp

@@ -59,7 +59,6 @@ TArray<AHexTile*> AAdventurePlayerController::Vision(int32 Radius)
 {
     TArray<AHexTile*> Results;
     TSet<AHexTile*> Visible;
-    if (CurrentHex->bDiagMove) { Radius = FMath::FloorToInt(float(Radius) * (2.f / 3.f)); }
     Visible = MapRef->BreadthFirstSearch(CurrentHex, Radius);
     for (auto& Hex : Visible) {
         if (ExploredHexes.Contains(Hex)) { continue; }
@@ -71,6 +70,10 @@ TArray<AHexTile*> AAdventurePlayerController::Vision(int32 Radius)
 
 void AAdventurePlayerController::MarkPath(TArray<AHexTile*> Path)
 {
+    if (Path.IsEmpty()) { return; }
+    else if (!IsValid(Path[0])) { return; }
+    else if (CurrentHex->Distance(Path[0])>1) { return; }
+
     FHexVector DirA = FHexVector(Path[0]->Q - CurrentHex->Q, Path[0]->R - CurrentHex->R);
     FHexVector DirB;
     for (int32 i = 0; i < Path.Num() - 1; i++)