[issue6312] httplib fails with HEAD requests to pages with "transfer-encoding: chunked"

[chandrasekar]

chandrasekar <chkneo at gmail.com> added the comment:

HEAD request wont return any data. So before calling _read_chunked we
have to check the amt is none or not.If its none simply return b''

I've attached the patch too which is take in py3k branch

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keywords: +patch
nosy: +chkneo
Added file: http://bugs.python.org/file14389/6312.diff

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