QFontDatabase don't show all available styles.

On Windows list of available font styles in QFontDatabase don't shows all available styles.

Code:

 QFontDatabase fonts;
 QString family = "Glametrix";
 QStringList styles = fonts.styles(family);
 qDebug() << family;
 qDebug() << styles;

Qt 4.8.6 output:

"Glametrix"
("Normal", "Bold", "Italic", "Bold Italic", "Light", "Light Italic")

Later, this behavior looks like a broken.
It was intended or is it a bug?

Qt 5.3:

"Glametrix"
("Normal", "Bold", "Italic", "Bold Italic")

Source code in qwindowsfontdatabase.cpp enumerates only first font of many with same names.
EnumFontFamiliesEx at MSDN:

lfCharSet = DEFAULT_CHARSET
lfFaceName = '\0'

Enumerates all uniquely-named fonts within all character sets. If there are two fonts with the same name, only one is enumerated.

This patch enumerates fonts with same name.
Patched Qt 5.3.1:

"Glametrix"
("Normal", "Bold", "Italic", "Bold Italic", "Light", "Light Italic")