subrepo: make submerge() return the merged substate

This will be useful when reusing submerge() to improve the handling of subrepos
on mq.


# HG changeset patch
# User Angel Ezquerra <[e-mail]>
# Date 1377117244 -7200
#      Wed Aug 21 22:34:04 2013 +0200
# Node ID 2defb5453f223c3027eb2f7788fbddd52bbb3352
# Parent  a5c90acff5e61aae714ba6c9457d766c54b4f124
subrepo: make submerge() return the merged substate

This will be useful when reusing submerge() to improve the handling of subrepos
on mq.

mercurial/subrepo.py

@@ -237,6 +237,7 b' def submerge(repo, wctx, mctx, actx, ove'
 
     # record merged .hgsubstate
     writestate(repo, sm)
+    return sm
 
 def _updateprompt(ui, sub, dirty, local, remote):
     if dirty: