Do not check whether the apu_version.h file exists in the supplied APR-Util location *twice*.  os.path.isfile(path) implicates os.path.exists(path), so the second check effectively does nothing.
Do not check whether the apu_version.h file exists in the supplied APR-Util
location *twice*.  os.path.isfile(path) implicates os.path.exists(path), so
the second check effectively does nothing.

* build/generator/gen_win_dependencies.py
  (_find_apr_util_and_expat): Only check for the existence of the
    'apu_version.h' once.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1603921 13f79535-47bb-0310-9956-ffa450edef68

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