Fix bug where default values on pins could get cleared unexpectedly

Author: DoubleDeez

MDFastBinding.uplugin

@@ -1,7 +1,7 @@
 {
 	"FileVersion": 3,
 	"Version": 1,
-	"VersionName": "1.0",
+	"VersionName": "1.0.1",
 	"FriendlyName": "MDFastBinding",
 	"Description": "A versatile and performant alternative to UMG property bindings for designer-friendly workflows.",
 	"Category": "Other",

Source/MDFastBinding/Private/MDFastBindingObject.cpp

@@ -419,7 +419,7 @@ FMDFastBindingItem& UMDFastBindingObject::EnsureBindingItemExists(const FName& I
 		BindingItems.Add(MoveTemp(Item));
 		BindingItem = BindingItems.FindByKey(ItemName);
 	}
-	else if (BindingItem->HasDefaultValue() && BindingItem->ItemProperty.Get() != ItemProperty)
+	else if (BindingItem->HasDefaultValue() && BindingItem->ItemProperty.IsValid() && BindingItem->ItemProperty.Get() != ItemProperty)
 	{
 		// Clear defaults when the item property changed
 		BindingItem->ClearDefaultValues();