version 4.5.0

PIThread::stopAndWait now returns bool
PIKbdListener on Linux now use piwaitevent_p and can immediately stop
new base method piZeroMemory, also migrate all "memset 0" to piZeroMemory

libs/main/thread/pimutex.cpp

@@ -209,10 +209,10 @@ void PIMutex::init() {
 	PRIVATE->mutex = xSemaphoreCreateMutex();
 #else
 	pthread_mutexattr_t attr;
-	memset(&attr, 0, sizeof(attr));
+	piZeroMemory(attr);
 	pthread_mutexattr_init(&attr);
 	pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
-	memset(&(PRIVATE->mutex), 0, sizeof(PRIVATE->mutex));
+	piZeroMemory(PRIVATE->mutex);
 	pthread_mutex_init(&(PRIVATE->mutex), &attr);
 	pthread_mutexattr_destroy(&attr);
 #endif