dagop: check if stopdepth is greater than or equal to maxlogdepth

Might prevent off-by-one errors.

mercurial/dagop.py

@@ -221,7 +221,7 b' def revdescendants(repo, revs, followfir'
     Scan ends at the stopdepth (exlusive) if specified. Revisions found
     earlier than the startdepth are omitted.
     """
-    if startdepth is None and (stopdepth is None or stopdepth == maxlogdepth):
+    if startdepth is None and (stopdepth is None or stopdepth >= maxlogdepth):
         gen = _genrevdescendants(repo, revs, followfirst)
     else:
         gen = _genrevdescendantsofdepth(repo, revs, followfirst,