[gnome-photos] error-box: Use g_auto*

[Debarshi Ray <debarshir src gnome org>]

commit fd5f49096417586ac280e834a2d1568e512cb1c4
Author: Ekta Nandwani <mailnandwaniekta gmail com>
Date:   Sun Oct 15 17:25:43 2017 +0530

    error-box: Use g_auto*
    
    https://bugzilla.gnome.org/show_bug.cgi?id=788174

 src/photos-error-box.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/src/photos-error-box.c b/src/photos-error-box.c
index d6727cb..037542e 100644
--- a/src/photos-error-box.c
+++ b/src/photos-error-box.c
@@ -104,19 +104,19 @@ photos_error_box_new (void)
 void
 photos_error_box_update (PhotosErrorBox *self, const gchar *primary, const gchar *secondary)
 {
-  gchar *markup;
-
   if (primary != NULL)
     {
+      g_autofree gchar *markup = NULL;
+
       markup = g_markup_printf_escaped ("<big><b>%s</b></big>", primary);
       gtk_label_set_markup (GTK_LABEL (self->primary_label), markup);
-      g_free (markup);
     }
 
   if (secondary != NULL)
     {
+      g_autofree gchar *markup = NULL;
+
       markup = g_markup_escape_text (secondary, -1);
       gtk_label_set_markup (GTK_LABEL (self->secondary_label), markup);
-      g_free (markup);
     }
 }