[accounts-dialog] Fix a compiler warning

[Matthias Clasen <matthiasc src gnome org>]

commit d3050b16e3025c4aea042f2a3a2214fd9864d5c0
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Jan 18 23:01:23 2010 -0500

    Fix a compiler warning

 src/um-user.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/um-user.c b/src/um-user.c
index 592217d..d7de01d 100644
--- a/src/um-user.c
+++ b/src/um-user.c
@@ -604,6 +604,7 @@ um_user_render_icon (UmUser   *user,
         g_return_val_if_fail (UM_IS_USER (user), NULL);
         g_return_val_if_fail (icon_size > 12, NULL);
 
+        pixbuf = NULL;
         if (user->props->icon_file) {
                 res = check_user_file (user->props->icon_file,
                                        MAX_FILE_SIZE);