Propagate errors from within the parsing callbacks.
Propagate errors from within the parsing callbacks.

(struct report_baton_t): add "err" member
(start_element, end_element): stash the error away for later use
(reporter_finish_report): return an error, if present in the ctx


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@839275 13f79535-47bb-0310-9956-ffa450edef68

wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,wbond/subversion