zeromq/zyre — pull request #50 by shancat (2012-11-22 17:23:48+00:00)
Title: Fix uninitialised variable warning/error.

Running `make` produces this error in the build process:
```
zre_logger.c: In function ‘main’:
zre_logger.c:63:12: error: ‘event’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
zre_logger.c:38:11: note: ‘event’ was declared here
cc1: all warnings being treated as errors
```

This PR fixes the build by initialising `char* event` to `NULL`.