[OpenSIPS-Devel] [OpenSIPS/opensips] db2569: fix compression module bugs

[ionutrazvanionita]

  Branch: refs/heads/master
  Home:   https://github.com/OpenSIPS/opensips
  Commit: db25690d3b810bba9ecb1174a6a1ec4af7b9651f
      https://github.com/OpenSIPS/opensips/commit/db25690d3b810bba9ecb1174a6a1ec4af7b9651f
  Author: ionutrazvanionita <ionutionita at opensips.org>
  Date:   2015-10-05 (Mon, 05 Oct 2015)

  Changed paths:
    M modules/compression/compression.c
    M modules/compression/gz_helpers.c

  Log Message:
  -----------
  fix compression module bugs

* proper error messages on compress
* correct buffer size aproximation on gzip compress(10% + 12)
* fix bug on decompression