[PATCH] Fix NameFinder.java when addr2line does not exist

[Andrew Pinski]

The problem here is that we really don't take into effect that a couple 
of variables
could be null so get some NPE (NullPointerExceptions).  This patch 
fixes up the
problem and now on darwin, I can get a backtrace without the message 
saying NPE
was thrown when printing out the backtrace.

OK? Bootstrapped and tested on ppc-darwin with no regressions.

Thanks,
Andrew Pinski

ChangeLog:

	* gnu/gcj/runtime/NameFinder.java (close): IN, OUT, and PROC can all 
be null,
	check for that case and don't deference it.

Patch:
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