[gimp] plug-ins: fix some warnings in metadata/

[Michael Natterer <mitch src gnome org>]

commit a10b07e3986805391694656096d14c680c5bb210
Author: Michael Natterer <mitch gimp org>
Date:   Fri Jul 7 19:14:47 2017 +0200

    plug-ins: fix some warnings in metadata/

 plug-ins/metadata/metadata-editor.c |    2 +-
 plug-ins/metadata/metadata-viewer.c |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/plug-ins/metadata/metadata-editor.c b/plug-ins/metadata/metadata-editor.c
index e4fa12d..02ca67a 100644
--- a/plug-ins/metadata/metadata-editor.c
+++ b/plug-ins/metadata/metadata-editor.c
@@ -3935,7 +3935,7 @@ metadata_editor_write_callback (GtkWidget  *dialog,
 
   g_metadata = gimp_image_get_metadata (image_id);
 
-  gimp_metadata_add_xmp_history(GEXIV2_METADATA (g_metadata), "metadata");
+  gimp_metadata_add_xmp_history (g_metadata, "metadata");
 
   /* DO ORG IMG NAME (LISTSTORE) */
 
diff --git a/plug-ins/metadata/metadata-viewer.c b/plug-ins/metadata/metadata-viewer.c
index 3b82c51..e6b7cbc 100644
--- a/plug-ins/metadata/metadata-viewer.c
+++ b/plug-ins/metadata/metadata-viewer.c
@@ -155,7 +155,7 @@ run (const gchar      *name,
           gimp_image_set_metadata (image_ID, metadata);
         }
 
-      metadata_viewer_dialog (image_ID, metadata);
+      metadata_viewer_dialog (image_ID, GEXIV2_METADATA (metadata));
 
       status = GIMP_PDB_SUCCESS;
     }