Revision 1658200

[Reverted in r1658210]
Minor refactoring in ra_svn's editor implementation.

This is in preparation of turning the command table into a hashed table.

* subversion/libsvn_ra_svn/editorp.c
  (cmd_handler_t): Explicitly define the handler function type.
  (ra_svn_edit_cmds): Use that type.
  (cmd_lookup): New function factored out of ...
  (svn_ra_svn_drive_editor2): ... this one.