hgweb: move call to protocol handler outside of try..except

The protocol handler doesn't raise ErrorResponse. So it doesn't
need to be in this `try..except ErrorResponse` block.

Differential Revision: https://phab.mercurial-scm.org/D2020

mercurial/hgweb/hgweb_mod.py

@@ -368,7 +368,6 b' class hgweb(object):'
                     raise ErrorResponse(HTTP_NOT_FOUND)
                 if cmd in perms:
                     self.check_perm(rctx, req, perms[cmd])
-                return protohandler['dispatch']()
             except ErrorResponse as inst:
                 # A client that sends unbundle without 100-continue will
                 # break if we respond early.
@@ -383,6 +382,8 b' class hgweb(object):'
                             body='0\n%s\n' % inst)
                 return ''
 
+            return protohandler['dispatch']()
+
         # translate user-visible url structure to internal structure
 
         args = query.split('/', 2)