[gnome-panel] clock: don't use uninitialized variable

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 01dbc4c1cc8c8fb680024aa68434ef4bfb9c399b
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sat Oct 11 23:29:16 2014 +0300

    clock: don't use uninitialized variable
    
    Make sure we don't try to use uninitialized variable in
    clock_needs_label_refresh function.

 applets/clock/clock-location-tile.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/applets/clock/clock-location-tile.c b/applets/clock/clock-location-tile.c
index c52df71..e1b21b0 100644
--- a/applets/clock/clock-location-tile.c
+++ b/applets/clock/clock-location-tile.c
@@ -400,6 +400,9 @@ clock_needs_label_refresh (ClockLocationTile *this)
        long offset;
        gboolean retval;
 
+       if (!priv->last_refresh)
+               return TRUE;
+
         now = clock_location_localtime (priv->location);
        offset = clock_location_get_offset (priv->location);