[libgda] GdaDataModel: fix memory leak when import copy params

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit 2300ef2a78a9efc109f6407afd0c22b24f5ae14d
Author: Daniel Espinosa <esodan gmail com>
Date:   Mon Apr 22 14:42:30 2019 -0500

    GdaDataModel: fix memory leak when import copy params

 libgda/gda-data-model.c | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/libgda/gda-data-model.c b/libgda/gda-data-model.c
index 7e42ae05f..4836c9090 100644
--- a/libgda/gda-data-model.c
+++ b/libgda/gda-data-model.c
@@ -1991,6 +1991,7 @@ gda_data_model_import_from_model (GdaDataModel *to, GdaDataModel *from,
                            (gda_holder_get_g_type (param) != G_TYPE_INVALID) &&
                            !g_value_type_transformable (gda_holder_get_g_type (param), 
                                                         gda_column_get_g_type (column))) {
+                         g_slist_free (copy_params);
                                g_set_error (error, GDA_DATA_MODEL_ERROR, GDA_DATA_MODEL_VALUE_TYPE_ERROR,
                                             _("Destination column %d has a gda type (%s) incompatible with "
                                               "source column %d type (%s)"), i,
@@ -2134,6 +2135,9 @@ gda_data_model_import_from_model (GdaDataModel *to, GdaDataModel *from,
        }
        
        /* free memory */
+  if (copy_params) {
+         g_slist_free (copy_params);
+  }
   g_list_free_full (append_values, (GDestroyNotify) gda_value_free);
        g_free (append_types);