Fix: Func with typed args error when arg is null

modules/gdscript/tests/scripts/runtime/features/typed_argument_is_null.gd

@@ -0,0 +1,27 @@
+# https://github.com/godotengine/godot/issues/72967
+
+class CustomNode:
+	extends Node
+
+	static func test_custom_node(n: CustomNode):
+		if not n:
+			print("null node")
+
+func test():
+	test_typed_argument_is_null()
+
+func get_custom_node() -> CustomNode:
+	return null
+
+func test_typed_argument_is_null():
+	var node: Node = Node.new()
+	print_node_name(node.get_parent())
+	node.free()
+	test_custom_node()
+
+func test_custom_node():
+	CustomNode.test_custom_node(get_custom_node())
+
+func print_node_name(n: Node):
+	if not n:
+		print("null node")

modules/gdscript/tests/scripts/runtime/features/typed_argument_is_null.out

@@ -0,0 +1,3 @@
+GDTEST_OK
+null node
+null node