Remove Mac-specific wxFont ctors and fix strikethrough support

Only accept fractional point sizes and numeric weights via wxFont ctor
using wxFontInfo and avoid having specific ctor/Create() overloads for
the different combinations of font properties: this is not portable (as
these ctors don't exist in the other ports) and unsustainable due to the
very real potential of combinatorial explosion as more properties are
added.

As a side-effect, fix support for stricken-through fonts under Mac,
which was broken, by adding the missing wxFontInfo::IsStrikethrough()
call.

include/wx/osx/font.h

@@ -56,17 +56,6 @@ public:
         Create(size, family, style, weight, underlined, face, encoding);
     }
 
-    wxFont(float size,
-           wxFontFamily family,
-           wxFontStyle style,
-           int weight,
-           bool underlined = false,
-           const wxString& face = wxEmptyString,
-           wxFontEncoding encoding = wxFONTENCODING_DEFAULT)
-    {
-        Create(size, family, style, weight, underlined, face, encoding);
-    }
-    
     wxFont(const wxSize& pixelSize,
            wxFontFamily family,
            wxFontStyle style,
@@ -87,14 +76,6 @@ public:
                 const wxString& face = wxEmptyString,
                 wxFontEncoding encoding = wxFONTENCODING_DEFAULT);
 
-    bool Create(float size,
-                wxFontFamily family,
-                wxFontStyle style,
-                int weight,
-                bool underlined = false,
-                const wxString& face = wxEmptyString,
-                wxFontEncoding encoding = wxFONTENCODING_DEFAULT);
-    
     wxFont(const wxNativeFontInfo& info)
     {
         (void)Create(info);

src/osx/carbon/font.cpp

@@ -542,13 +542,17 @@ wxFont::wxFont(const wxString& fontdesc)
 
 wxFont::wxFont(const wxFontInfo& info)
 {
-    Create(info.GetFractionalPointSize(),
+    m_refData = new wxFontRefData
+                    (
+                        info.GetFractionalPointSize(),
                         info.GetFamily(),
                         info.GetStyle(),
                         info.GetNumericWeight(),
                         info.IsUnderlined(),
+                        info.IsStrikethrough(),
                         info.GetFaceName(),
-           info.GetEncoding());
+                        info.GetEncoding()
+                    );
 
     if ( info.IsUsingSizeInPixels() )
         SetPixelSize(info.GetPixelSize());
@@ -566,22 +570,6 @@ wxFont::wxFont(int size,
         (wxFontWeight)weight, underlined, face, encoding);
 }
 
-bool wxFont::Create(float pointSize,
-    wxFontFamily family,
-    wxFontStyle style,
-    int weight,
-    bool underlined,
-    const wxString& faceName,
-    wxFontEncoding encoding)
-{
-    UnRef();
-    
-    m_refData = new wxFontRefData(pointSize, family, style, weight,
-                                  underlined, false, faceName, encoding);
-    
-    return true;
-}
-
 bool wxFont::Create(int pointSize,
     wxFontFamily family,
     wxFontStyle style,
@@ -592,10 +580,14 @@ bool wxFont::Create(int pointSize,
 {
     AccountForCompatValues(pointSize, style, weight);
 
-    return Create(wxFontInfo::ToFloatPointSize(pointSize),
+    m_refData = new wxFontRefData
+                    (
+                        wxFontInfo::ToFloatPointSize(pointSize),
                         family, style,
                         GetNumericWeightOf(weight),
-                  underlined, faceName, encoding);
+                        underlined, false, faceName, encoding
+                    );
+    return true;
 }
 
 wxFont::~wxFont()