Defect in XSH pthread_mutexattr_destroy

[yyyyyyyy@xxxxxxx]

        Defect report from : Loic Domaigne , Personal Interest

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@ page 1091 line 34280 section pthread_mutexattr_destroy comment 
{pthread_mutexattr_init, issue EBUSY}

Problem:

Edition of Specification (Year): 2003

Defect code :  2. Omission

References are given against TC1.

In lines 34272-34273, it is said that:

| results are undefined if pthread_mutexattr_init() is called
| specifying an already initialized attr attributes object. 

However, the standard doesn't define any optional checking for this error.

Action:

At l34280-34285 (§ERRORS), add:

The pthread_mutexattr_init() may fail if:

[EBUSY]
The implementation has detected an attempt to reinitialize the mutex 
attribute object referenced by attr, a previously initialized, 
but not yet destroyed, attribute object.