cameron314/concurrentqueue — pull request #7 by iefserge (2014-11-29 12:11:28+00:00)
Title: Wsign compare warning fix

This fixes Wsign-compare warning
```
concurrentqueue.h:1251:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (auto j = 0; j != count; ++j) {
^
```