Fix build without XMP support

https://bugzilla.gnome.org/show_bug.cgi?id=737213

origin commit:
https://gitlab.gnome.org/GNOME/eog/commit/037affa

Author: raveit65

src/eom-image.c

@@ -2040,14 +2040,14 @@ eom_image_get_exif_info (EomImage *img)
 gpointer
 eom_image_get_xmp_info (EomImage *img)
 {
-	EomImagePrivate *priv;
  	gpointer data = NULL;
 
  	g_return_val_if_fail (EOM_IS_IMAGE (img), NULL);
 
+#ifdef HAVE_EXEMPI
+	EomImagePrivate *priv;
  	priv = img->priv;
 
-#ifdef HAVE_EXEMPI
 	g_mutex_lock (&priv->status_mutex);
  	data = (gpointer) xmp_copy (priv->xmp);
 	g_mutex_unlock (&priv->status_mutex);

src/eom-properties-dialog.c

@@ -93,6 +93,9 @@ struct _EomPropertiesDialogPrivate {
 	GtkWidget      *xmp_keywords_label;
 	GtkWidget      *xmp_creator_label;
 	GtkWidget      *xmp_rights_label;
+#else
+	GtkWidget      *xmp_box;
+	GtkWidget      *xmp_box_label;
 #endif
 #if HAVE_METADATA
 	GtkWidget      *metadata_box;
@@ -685,9 +688,6 @@ static void
 eom_properties_dialog_init (EomPropertiesDialog *prop_dlg)
 {
 	EomPropertiesDialogPrivate *priv;
-#ifndef HAVE_EXEMPI
-	GtkWidget *xmp_box, *xmp_box_label;
-#endif
 #if HAVE_METADATA
 	GtkWidget *sw;
 #endif
@@ -742,8 +742,8 @@ eom_properties_dialog_init (EomPropertiesDialog *prop_dlg)
 	}
 
 #ifndef HAVE_EXEMPI
-	gtk_widget_hide (xmp_box);
-	gtk_widget_hide (xmp_box_label);
+	gtk_widget_hide (priv->xmp_box);
+	gtk_widget_hide (priv->xmp_box_label);
 #endif
 
 #else