#4 FIXES CRASH on 0.3.0: POSIX Uphold pthread's specification

[Mario Sergio Fujikawa Ferreira]

Do not try to use a pthread_mutexattr_t variable
without first initializing it with
pthread_mutexattr_init(3)

The patch allows libjingle to compile under FreeBSD and
possibly other OSs which strictly follow the pthreads
standard which says nothing about pthread_mutexattr_t
other than there is a function to do it. Therefore,
assuming that using pthread_mutexattr_t without
initializing it is not guaranteed to work.

[Mario Sergio Fujikawa Ferreira]

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Affected file:

talk/base/criticalsection.h

[Mario Sergio Fujikawa Ferreira]

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Furthermore, there should be a matching
pthread_mutexattr_destroy() for each
pthread_mutexattr_init().

Affected file:

talk/base/thread.cc

[Mario Sergio Fujikawa Ferreira]

Add matching pthread_mutexattr_destroy() for each pthread_mutexattr_init()

[Mario Sergio Fujikawa Ferreira]

FIXES CRASH: Both pthread_mutexattr_init() and pthread_mutexattr_destroy() a phtread_mutexattr_t variable.

[Mario Sergio Fujikawa Ferreira]

Add matching pthread_mutexattr_destroy() for each pthread_mutexattr_init()

[Mario Sergio Fujikawa Ferreira]

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Affected file:

talk/session/phone/linphonemediaengine.cc

[Mario Sergio Fujikawa Ferreira]

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Also, every pthread_mutexattr_init() requires a matching
pthread_mutexattr_destroy() since the definition of
pthread_mutexattr_t is unknown