Initialize wxFontRefData::m_info directly in wxOSX code

Instead of using default ctor and Init() later, just use the appropriate
ctor directly.

src/osx/carbon/font.cpp

@@ -41,8 +41,8 @@ public:
     wxFontRefData(const wxFontRefData& data);
 
     wxFontRefData(const wxNativeFontInfo& info)
+        : m_info(info)
     {
-        m_info.Init(info);
     }
 
     wxFontRefData(CTFontRef font);