More work on look-at, split LuaCall into LuaInvoke/LuaProbe

Source/Integration/LuaCall.h

@@ -17,7 +17,7 @@ class UlxLuaValues;
 
 UENUM(BlueprintType)
 enum class ElxLuaValueType : uint8 {
-    None,
+    End,
     String,
 	Name,
     Float,
@@ -272,7 +272,7 @@ public:
     bool IsNextType(ElxLuaValueType Type) const { return NextType() == Type; }
 
     UFUNCTION(BlueprintCallable, meta = (ExpandEnumAsExecs = "ReturnValue"), Category = "Luprex|Lua Value Array")
-    ElxLuaValueType SwitchNextType() const { return NextType(); }
+    ElxLuaValueType SwitchNextType() { return NextType(); }
 	
     UFUNCTION(BlueprintCallable, meta = (ExpandEnumAsExecs = "Status"), Category = "Luprex|Lua Value Array")
     void ReadString(ElxSuccessOrError &Status, FString &Result);