Function initWtkIfNotDone

src/backend/opengl/window_impl.cpp:87–95

static int initCallCount = -1;

void initWtkIfNotDone()
{
    std::lock_guard<std::mutex> lock(initMutex);

    initCallCount++;

    if (initCallCount==0)
        forge::wtk::initWindowToolkit();
}

void destroyWtkIfDone()
{