Follow-up to r35093, fix a deadlock situation with the test suite when using Python < 2.4.
Follow-up to r35093, fix a deadlock situation with the test suite when using
Python < 2.4.

* subversion/tests/cmdline/svntest/main.py
  (spawn_process): Return Python < 2.4 code path to pre-r35093 state;
  specifically, close the stdin pipe obtained with Popen3() or os.popen3()
  as soon as we are done writing to it.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@875267 13f79535-47bb-0310-9956-ffa450edef68

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