Remove redundant assignments in mainLoop
Remove redundant assignments in mainLoop

test_parser.py still reports the same number of fails (9)

http://code.google.com/p/html5lib/issues/detail?id=177

dstufft/html5lib-python,html5lib/html5lib-python,dstufft/html5lib-python,mgilson/html5lib-python,alex/html5lib-python,mindw/html5lib-python,gsnedders/html5lib-python,alex/html5lib-python,mgilson/html5lib-python,html5lib/html5lib-python,mindw/html5lib-python,gsnedders/html5lib-python,mgilson/html5lib-python,ordbogen/html5lib-python,html5lib/html5lib-python,dstufft/html5lib-python,ordbogen/html5lib-python,mindw/html5lib-python,ordbogen/html5lib-python,alex/html5lib-python