QTemporary Dir, 1-time 4 byte memory leak

Running valgrind on a program that uses QTemporaryFile and calls QTemporaryFile::open() induces a 1-time, 4-byte memory leak.

Using it within a loop, say, 1000 times still creates the same memory leak, demonstrating it is not a major issue

If the temporary file is not opened, merely created and then destroyed, there is no memory leak.