QAudioDeviceInfo::isFormatSupported and QAudioDeviceInfo::nearestFormat work incorrectly in Qt 4.7.0/4.7.1 Multimedia for Windows

QAudioDeviceInfo::isFormatSupported and QAudioDeviceInfo::nearestFormat methods work incorrectly in Qt 4.7.0/4.7.1 Multimedia for Windows. Both these do not verify correctly settings for sample type, sample size, byte order, and sample rate in the input format. QAudioDeviceInfo::isFormatSupported returns true even if settings for these parameters are not supported by the audio system. QAudioDeviceInfo::nearestFormat returns the output format with these unsupported settings. In the result, when we create QAudioOutput by using the format with unsupported settings this does not work.
These methods worked correctly in Qt 4.6.2.

As I can see the problem is in QAudioDeviceInfoInternal::testSettings() (qaudiodeviceinfo_win32-P.cpp, Qt 4.7.0/4.7.1)

bool QAudioDeviceInfoInternal::testSettings(const QAudioFormat& format) const
{
// Set nearest to closest settings that do work.
// See if what is in settings will work (return value).

bool failed = false;
bool match = false;

// check codec
for( int i = 0; i < codecz.count(); i++)

{ if (format.codec() == codecz.at(i)) match = true; }

if (!match) failed = true;

// check channel
match = false;
if (!failed) {
for( int i = 0; i < channelz.count(); i++) {
if (format.channels() == channelz.at)

{ match = true; break; }
}
}
if (!match) failed = true;

// check frequency
match = false;
if (!failed) {
for( int i = 0; i < freqz.count(); i++) {
if (format.frequency() == freqz.at) { match = true; break; }

}
}

// check sample size
match = false;
if (!failed) {
for( int i = 0; i < sizez.count(); i++) {
if (format.sampleSize() == sizez.at)

{ match = true; break; }
}
}

// check byte order
match = false;
if (!failed) {
for( int i = 0; i < byteOrderz.count(); i++) {
if (format.byteOrder() == byteOrderz.at) { match = true; break; }

}
}

// check sample type
match = false;
if (!failed) {
for( int i = 0; i < typez.count(); i++) {
if (format.sampleType() == typez.at)

{ match = true; break; }

}
}

if(!failed)

{ // settings work return true; }

return false;
}

The 'failed' flag is not set to 'true' as it needs after checking frequency, sample size, byte order, and sample type when these settings are not supported by audio system (are not present in appropriate lists).