missing Type in marshalModuleCall Attribute

The type isn't needed here for what marshalModuleCall is doing
(converting hcl config into the generic plan json config output), but
the new check in configschema prevents the invalid Attribute value.

Author: jbardin

internal/command/jsonconfig/config.go

@@ -414,6 +414,7 @@ func marshalModuleCall(c *configs.Config, mc *configs.ModuleCall, schemas *terra
 	schema.Attributes = make(map[string]*configschema.Attribute)
 	for _, variable := range c.Module.Variables {
 		schema.Attributes[variable.Name] = &configschema.Attribute{
+			Type:     cty.DynamicPseudoType,
 			Required: variable.Default == cty.NilVal,
 		}
 	}