Fix missing defaults on node gradient inputs

Author: Keavon

node-graph/graph-craft/src/document/value.rs

@@ -127,6 +127,9 @@ macro_rules! tagged_value {
 						// Tries using the default for the tagged value type. If it not implemented, then uses the default used in document_node_types. If it is not used there, then TaggedValue::None is returned.
 						Some(match concrete_type.id? {
 							x if x == TypeId::of::<()>() => TaggedValue::None,
+							// Table-wrapped types need a single-row default with the element's default, not an empty table
+							x if x == TypeId::of::<Table<Color>>() => TaggedValue::Color(Table::new_from_element(Color::default())),
+							x if x == TypeId::of::<Table<GradientStops>>() => TaggedValue::GradientTable(Table::new_from_element(GradientStops::default())),
 							$( x if x == TypeId::of::<$ty>() => TaggedValue::$identifier(Default::default()), )*
 							_ => return None,
 						})