[libgweather] Don't crash when unsetting the location

[Giovanni Campagna <gcampagna src gnome org>]

commit c815875154fbeb653c9f0313912409eb22384036
Author: Sjoerd Simons <sjoerd luon net>
Date:   Sat Sep 21 18:08:57 2013 +0200

    Don't crash when unsetting the location
    
    Setting the location of the entry to NULL is documented to unset the
    location, but unfortunately in practice it caused a crash in
    gweather_location_equal()
    
    https://bugzilla.gnome.org/show_bug.cgi?id=708586

 libgweather/location-entry.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/libgweather/location-entry.c b/libgweather/location-entry.c
index 7fe58fc..7712879 100644
--- a/libgweather/location-entry.c
+++ b/libgweather/location-entry.c
@@ -321,6 +321,11 @@ gweather_location_entry_set_location (GWeatherLocationEntry *entry,
     completion = gtk_entry_get_completion (GTK_ENTRY (entry));
     model = gtk_entry_completion_get_model (completion);
 
+    if (loc == NULL) {
+       set_location_internal (entry, model, NULL, NULL);
+       return;
+    }
+
     gtk_tree_model_get_iter_first (model, &iter);
     do {
        gtk_tree_model_get (model, &iter,