* subversion/libsvn_diff/diff_file.c   (svn_diff_file_options_parse): Following up on r1603847, remove     checking for 0 and negative context size. The api already handles these     as 3 lines of context.
* subversion/libsvn_diff/diff_file.c
  (svn_diff_file_options_parse): Following up on r1603847, remove
    checking for 0 and negative context size. The api already handles these
    as 3 lines of context.

Suggested by: stsp


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1603875 13f79535-47bb-0310-9956-ffa450edef68

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