[Zlib-devel] zlib 1.2.6 released

[Jan Nijtmans]

One more suggestion for zlib 1.2.7. Currently, gzgetc is a macro around the
function gzgetc_, which is actually the same as gzgetc. It is possible
to change the macro, such that it wraps around the original gzgetc function,
which makes the gzgetc_ function obsolete.

Here is a patch doing that. Tested with mingw, but should work fine
with any other compiler.

What the patch does:
- Modify the gzgetc macro (using braces to prevent recursive macro
  substitution, even though I don't know any compiler doing that)
- Move the gzgetc_ signature from zlib.h to gzread.c
- In gzread.c, make gzgetc_ a function calling gzgetc, and
  not the other way around.

Regards,
       Jan Nijtmans
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