William Lallemand 08289f12f9 BUILD: remove dependency to zlib.h
The build was dependent of the zlib.h header, regardless of the USE_ZLIB
option. The fix consists of several #ifdef in the source code.

It removes the overhead of the zstream structure in the session when you
don't use the option.
2012-11-05 10:23:16 +01:00
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2012-11-05 10:23:16 +01:00