Gregory Nutt 21c97b16cf Revert "sem_wait.c edited online with Bitbucket. Fix some correct but useless code."
What was I thinking?  I missed that litle minus sign and the possibility that the errno might be some positive non-zero value.

This reverts commit 43880878e4f2d317d4ddb589061d9bfb6d71fbca.
2017-10-05 16:01:01 -06:00
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