Follow-up to r37522:
Follow-up to r37522:

* build/generator/gen_win.py
  (WinGeneratorBase._find_swig): Don't try to use 'outfp' when it isn't defined.

Found by: rhuijben

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion