Fixed Qt config macro declaration

[Daschle-Newberry]

The macro definition of Q_ASSERT_X results in false positives.

Example

#include <QDebug>

void test()
{
    const char *where = "test";
    const char *what = "assertion failed";

    Q_ASSERT_X(false, where, what);
}

This code block results in:

style: Variable 'where' is assigned a value that is never used. [unreadVariable]
style: Variable 'what' is assigned a value that is never used. [unreadVariable]

The existing definition discards where and what arguments when modeling Q_ASSERT_X. The fix preserves these arguments using (void) (what) and (void) (where)

[chrchr-github]

Thanks for your contribution. Please add a test in test/cfg/qt.cpp.

[chrchr-github]

How would you like to be credited in the AUTHORS file?

[Daschle-Newberry]

Sorry I didn’t get around to adding the test, my school just started and I got a bit distracted. You can use my GitHub username (First/Last). I hope I can contribute again in the future.