ORC-659: Initialize "next_in" before calling DeflateInit2 (#514)
ORC-659: Initialize "next_in" before calling DeflateInit2 (#514)

### What changes were proposed in this pull request?

This PR aims to initialize `next_in` before calling DeflateInit2.

### Why are the changes needed?

According to zlib documentation of DeflateInit2:

_"This is another version of deflateInit with more compression options. The fields **next_in**, zalloc, zfree and opaque must be initialized before by the caller."_

In an alpine docker DeflateInit2 was returning an error that seems to be solved with the patch.

### How was this patch tested?

Pass UT.
apache/orc,apache/orc,omalley/orc,apache/orc,omalley/orc,apache/orc,apache/orc,apache/orc,apache/orc,omalley/orc,apache/orc,omalley/orc,omalley/orc,omalley/orc,omalley/orc