Testing your patch with Inkscape r22275 on OS X 10.5.8
Quick first impression (I am not a font expert): 'italic' on the font tool controls bar works more often 'as expected' then before ;)
i.e. doesn't work correctly for OS X font formats (DFONT = Datafork TrueType font, Font Suitcase), but fine for TTF and OTF fonts.
Testing your patch with Inkscape r22275 on OS X 10.5.8
Quick first impression (I am not a font expert): 'italic' on the font tool controls bar works more often 'as expected' then before ;)
i.e. doesn't work correctly for OS X font formats (DFONT = Datafork TrueType font, Font Suitcase), but fine for TTF and OTF fonts.