Fixed Qt config macro declaration - #8796

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)