
(timestamps_equal_p): rearrange error-check logic; if we can't stat
one or both files, assume timestamps are different.

(filesizes_definitely_different_p): renamed from filesizes_equal_p.
This question more accurately describes why we're running the test. :)
Again, if we can't stat one or both files, return `different = FALSE'.

(svn_wc__file_modified_p): clean up logic, using routines above.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@837677 13f79535-47bb-0310-9956-ffa450edef68

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