exchange: fix bad indentation

Those two lines where double indented for no good reasons.

mercurial/exchange.py

@@ -574,8 +574,8 b' def _pullbundle2(pullop):'
     # pulling changegroup
     pullop.todosteps.remove('changegroup')
     if not pullop.fetch:
-            pullop.repo.ui.status(_("no changes found\n"))
-            pullop.cgresult = 0
+        pullop.repo.ui.status(_("no changes found\n"))
+        pullop.cgresult = 0
     else:
         kwargs['common'] = pullop.common
         kwargs['heads'] = pullop.heads or pullop.rheads