calltree_update_clock : use correct type, returns something

gnome/src/contacts/calltree.c

@@ -1335,7 +1335,7 @@ void calltree_display (calltab_t *tab)
 gboolean calltree_update_clock(gpointer data UNUSED)
 {
     char timestr[20];
-    char *msg = "";
+    const gchar *msg = "";
     long duration;
     callable_obj_t *c = calltab_get_selected_call (current_calls);
 
@@ -1357,6 +1357,7 @@ gboolean calltree_update_clock(gpointer data UNUSED)
         }
 
     statusbar_update_clock (msg);
+    return TRUE;
 }