[gnome-maps] trivial: Actually skip empty tag values when serializing OSM objects

[Marcus Lundblad <mlundblad src gnome org>]

commit 214126d5c560502c747fa2842526c58cab13526d
Author: Marcus Lundblad <ml update uu se>
Date:   Mon Jan 25 22:01:16 2016 +0100

    trivial: Actually skip empty tag values when serializing OSM objects
    
    Do as the comment suggests, and don't include tags with empty values.
    This could happen if the user adds for example a name field and leaves
    it empty.

 lib/maps-osm-object.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/lib/maps-osm-object.c b/lib/maps-osm-object.c
index 270e593..c171925 100644
--- a/lib/maps-osm-object.c
+++ b/lib/maps-osm-object.c
@@ -229,7 +229,7 @@ maps_osm_object_foreach_tag (gpointer key, gpointer value, gpointer user_data)
   xmlNodePtr object_node = (xmlNodePtr) user_data;
 
   /* skip tag if it has an empty placeholder value */
-  if (val)
+  if (val && *val)
     {
       xmlNodePtr tag_node;