Unreachable code in coremsg.c

[Krzysztof Mięsowicz]

Hi,

I analyzed
http://www.rtems.org/ftp/pub/rtems/people/joel/coverage/erc32/erc32-Ospd-20120714-1625/uncovered.htmlcoverage
reports for first uncovered range. I discovered that 2 uncovered
instructions can't be reach because code above if statement guarantee that
condition won't be true never.

I attached patch and filed Bugzilla PR.

Regards,

Krzysztof Miesowicz
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