Tag: Add toggle to prev selected tag if tag is selected two times (requested by addikt1ve)

src/client.c

@@ -1229,7 +1229,8 @@ client_unmanage(Client *c)
           infobar_draw(c->screen);
      }
 
-     XFree(c->title);
+
+     /*XFree(c->title);*/
 
      client_focus_next(c);
 

src/tag.c

@@ -61,11 +61,14 @@ tag_set(int tag)
      }
      else
      {
-          if(!tag || tag == seltag[selscreen]
+          if(!tag || (tag == seltag[selscreen] && tag == prevseltag[selscreen])
              || tag > conf.ntag[selscreen])
                return;
 
-          seltag[selscreen] = tag;
+          if(tag == seltag[selscreen] && tag != prevseltag[selscreen])
+               tag = seltag[selscreen] = prevseltag[selscreen];
+          else
+               seltag[selscreen] = tag;
      }
 
      ewmh_update_current_tag_prop();