ErikDubbelboer/node-sleep — pull request #4 by pilliq (2013-09-19 15:15:49+00:00)
Title: Fixed BUILD_NODE_EXTENSION macro redefinition

Building on Mac OSX 10.7.5 was giving the following warning:

```
../sleep.cc:2:9: warning: 'BUILDING_NODE_EXTENSION' macro redefined
#define BUILDING_NODE_EXTENSION
^
:4:9: note: previous definition is here
#define BUILDING_NODE_EXTENSION 1
^
1 warning generated.
```

This change fixes it.