QBasicAtomicInt::deref() doesn't return 0 when it should do thus causing memory leaks with classes like QByteArray on Solaris x64

QBasicAtomicInt::deref() doesn't return 0 when it should do thus causing memory leaks with classes like QByteArray on Solaris x64. deref() returns something other than 0 when the QByteArray in the following example is deleted therefore it ends up leaking memory.

#include <QByteArray>

int main(int argc, char **argv)
{
    for (int i=0;i<100;i++)
       QByteArray ba("foo");
    return 0;
}

Using dbx on Solaris with "check -memuse" shows a clear memory leak coming from the QByteArray