for (std::vector<gfxFont*>::iterator it = mFonts.begin(); it!=mFonts.end(); ++it)
for (gfxFontVector::iterator it = mFonts.begin(); it!=mFonts.end(); ++it)
    virtual ~gfxFontGroup() {        for (std::vector<gfxFont*>::iterator it = mFonts.begin(); it!=mFonts.end(); ++it)            delete *it;    }