rubinius/rubinius — pull request #2804 by sodabrew (2013-11-25 19:03:00+00:00)
Title: Consume the argument to RB_GC_GUARD to avoid a useless evaluation

Eliminates compiler warnings such as:
```
warning: expression result unused
[-Wunused-value]
RB_GC_GUARD(ptr);
^~~~~~~
```