Tiny fix so nightly docs build correctly.

docs/autogen_api.py

@@ -25,6 +25,7 b" if __name__ == '__main__':"
                                         r'\.cocoa',
                                         r'\.ipdoctest',
                                         r'\.Gnuplot',
+                                        r'\.frontend.process.winprocess',
                                         ]
     docwriter.write_api_docs(outdir)
     docwriter.write_index(outdir, 'gen',