[gimp/gimp-2-10] plug-ins: fix several memory leaks in metadata-editor.

[Jacob Boerema <jboerema src gnome org>]

commit cb3f7d527d8b8ccbfa4ff97d48096c2664ed876d
Author: Jacob Boerema <jgboerema gmail com>
Date:   Sun Mar 14 18:32:09 2021 -0400

    plug-ins: fix several memory leaks in metadata-editor.
    
    (cherry picked from commit 184b803811edfb5a8c75a9fa5c99718fb544ecb0)

 plug-ins/metadata/metadata-editor.c | 7 +++++++
 1 file changed, 7 insertions(+)
---
diff --git a/plug-ins/metadata/metadata-editor.c b/plug-ins/metadata/metadata-editor.c
index a95d58748b..c9861cbbe8 100644
--- a/plug-ins/metadata/metadata-editor.c
+++ b/plug-ins/metadata/metadata-editor.c
@@ -1973,6 +1973,7 @@ metadata_dialog_editor_set_metadata (GExiv2Metadata *metadata,
           gchar *value_utf;
 
           value_utf = clean_xmp_string (value);
+          g_free (value);
 
           if (! strcmp ("single", imageSupplierInfoTags[i].mode))
             {
@@ -1985,6 +1986,7 @@ metadata_dialog_editor_set_metadata (GExiv2Metadata *metadata,
               buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (widget));
               gtk_text_buffer_set_text (buffer, value_utf, -1);
             }
+          g_free (value_utf);
         }
     }
 
@@ -2003,11 +2005,13 @@ metadata_dialog_editor_set_metadata (GExiv2Metadata *metadata,
           gchar *value_utf;
 
           value_utf = clean_xmp_string (value);
+          g_free (value);
 
           if (! strcmp ("single", locationCreationInfoTags[i].mode))
             {
               gtk_entry_set_text (GTK_ENTRY (widget), value_utf);
             }
+          g_free (value_utf);
         }
     }
 
@@ -2027,6 +2031,7 @@ metadata_dialog_editor_set_metadata (GExiv2Metadata *metadata,
           gchar *value_utf;
 
           value_utf = clean_xmp_string (value);
+          g_free (value);
 
           if (! strcmp ("single", creatorContactInfoTags[i].mode))
             {
@@ -2038,6 +2043,7 @@ metadata_dialog_editor_set_metadata (GExiv2Metadata *metadata,
               buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (widget));
               gtk_text_buffer_set_text (buffer, value_utf, -1);
             }
+          g_free (value_utf);
         }
     }
 
@@ -3601,6 +3607,7 @@ metadata_dialog_editor_set_metadata (GExiv2Metadata *metadata,
                   gtk_combo_box_set_active (GTK_COMBO_BOX (widget), data);
                 }
             }
+          g_free (value);
         }
     }