FromString should not fail on wxMac if facename empty.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@18177 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/fontcmn.cpp

@@ -296,8 +296,11 @@ bool wxNativeFontInfo::FromString(const wxString& s)
     underlined = l != 0;
 
     faceName = tokenizer.GetNextToken();
+
+#ifndef __WXMAC__
     if( !faceName )
         return FALSE;
+#endif
 
     token = tokenizer.GetNextToken();
     if ( !token.ToLong(&l) )