Fix an unitialized memory read identified by valgrind.
Fix an unitialized memory read identified by valgrind.

* subversion/libsvn_wc/questions.c (svn_wc_check_wc): Check error before format


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@843162 13f79535-47bb-0310-9956-ffa450edef68

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