Fix threads initialization in kopete libjingle

[taken from FreeBSD kopete patches]
(cherry picked from commit 34dd52adff)

kopete/protocols/jabber/jingle/libjingle/talk/base/criticalsection.h

@@ -83,8 +83,10 @@ class CriticalSection {
 public:
   CriticalSection() {
     pthread_mutexattr_t mutex_attribute;
+    pthread_mutexattr_init(&mutex_attribute);
     pthread_mutexattr_settype(&mutex_attribute, PTHREAD_MUTEX_RECURSIVE);
     pthread_mutex_init(&mutex_, &mutex_attribute);
+    pthread_mutexattr_destroy(&mutex_attribute);
   }
   ~CriticalSection() {
     pthread_mutex_destroy(&mutex_);

kopete/protocols/jabber/jingle/libjingle/talk/base/thread.cc

@@ -113,6 +113,7 @@ void Thread::Start() {
   pthread_attr_t attr;
   pthread_attr_init(&attr);
   pthread_create(&thread_, &attr, PreLoop, this);
+  pthread_attr_destroy(&attr);
   started_ = true;
 }
 

kopete/protocols/jabber/jingle/libjingle/talk/session/phone/linphonemediaengine.cc

@@ -66,6 +66,7 @@ LinphoneMediaChannel::LinphoneMediaChannel() {
   
   pthread_attr_init(&attr);
   pthread_create(&thread_, &attr, &thread_function, this);
+  pthread_attr_destroy(&attr);
 }
 
 LinphoneMediaChannel::~LinphoneMediaChannel() {