Defect in XSH sem_post()

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        Defect report from : Ulrich Drepper , Red Hat

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@ page 1251 line 38962 section sem_post() objection {ud-sem4}

Problem:

Defect code :  1. Error

The specification for sem_post currently requires that EINVAL is returned for 
invalid descriptors.  This should be just in all the other cases of functions 
which take descriptors a "may fail".

Action:

Change line 38962 to:

The /sem_post()/ function may fail if: