mq: handle added patch renaming correctly

hgext/mq.py

@@ -2011,6 +2011,10 def rename(ui, repo, patch, name=None, *
     if r:
         wlock = r.wlock()
         try:
+            if r.dirstate[patch] == 'a':
+                r.dirstate.forget(patch)
+                r.dirstate.add(name)
+            else:
             if r.dirstate[name] == 'r':
                 r.undelete([name])
             r.copy(patch, name)