--- trunk/src/osm-gps-map.h	2009/09/03 19:12:44	96
+++ trunk/src/osm-gps-map.h	2009/09/07 06:16:06	97
@@ -83,6 +83,8 @@
 
 #define OSM_GPS_MAP_SOURCE_LAST  (OSM_GPS_MAP_SOURCE_VIRTUAL_EARTH_HYBRID)
 
+#define OSM_GPS_MAP_INVALID  (0.0/0.0)
+
 typedef struct {
     gint x, y, w, h;
 } OsmGpsMapRect_t;