Turn another wc-db assertion people are reporting into a normal error.
Turn another wc-db assertion people are reporting into a normal error.

* subversion/libsvn_wc/wc_db.c
  (read_children_info): If a node from an unexpected repository is found,
   don't assert but print an informative error message.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1222521 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion