[libgweather] Fix refcounting bug in GWeatherInfo

[Giovanni Campagna <gcampagna src gnome org>]

commit bbe6f7c1c85628336536bcec6684d281656a3739
Author: Giovanni Campagna <gcampagna src gnome org>
Date:   Mon May 22 08:39:45 2017 -0700

    Fix refcounting bug in GWeatherInfo
    
    The return value of find_by_station_code() is transfer none, but
    GWeatherInfo would take ownership of it.

 libgweather/gweather-weather.c |   17 +++++++++++------
 1 files changed, 11 insertions(+), 6 deletions(-)
---
diff --git a/libgweather/gweather-weather.c b/libgweather/gweather-weather.c
index 20b8c58..7d12b04 100644
--- a/libgweather/gweather-weather.c
+++ b/libgweather/gweather-weather.c
@@ -1992,7 +1992,7 @@ gweather_info_get_value_visibility (GWeatherInfo *info,
 
 static void
 gweather_info_set_location_internal (GWeatherInfo     *info,
-                                    GWeatherLocation *location)
+                                     GWeatherLocation *location)
 {
     GWeatherInfoPrivate *priv = info->priv;
     GVariant *default_loc = NULL;
@@ -2000,26 +2000,31 @@ gweather_info_set_location_internal (GWeatherInfo     *info,
     gboolean latlon_override = FALSE;
     gdouble lat, lon;
 
+    if (priv->glocation == location)
+        return;
+
     if (priv->glocation)
        gweather_location_unref (priv->glocation);
 
     priv->glocation = location;
 
     if (priv->glocation) {
-       gweather_location_ref (location);
+        gweather_location_ref (location);
     } else {
-       GWeatherLocation *world;
-       const gchar *station_code;
+        GWeatherLocation *world;
+        const gchar *station_code;
 
-       default_loc = g_settings_get_value (priv->settings, DEFAULT_LOCATION);
+        default_loc = g_settings_get_value (priv->settings, DEFAULT_LOCATION);
 
-       g_variant_get (default_loc, "(&s&sm(dd))", &name, &station_code, &latlon_override, &lat, &lon);
+        g_variant_get (default_loc, "(&s&sm(dd))", &name, &station_code, &latlon_override, &lat, &lon);
 
        if (strcmp(name, "") == 0)
            name = NULL;
 
        world = gweather_location_get_world ();
        priv->glocation = gweather_location_find_by_station_code (world, station_code);
+       if (priv->glocation)
+           gweather_location_ref (priv->glocation);
     }
 
     if (priv->glocation) {