Applied #8697 (Improve error detection for MacFindFont )

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@62122 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/mac/carbon/font.cpp

@@ -226,6 +226,8 @@ void wxFontRefData::MacFindFont()
     OSStatus status = noErr;
     Str255 qdFontName ;
 
+    wxCHECK_RET( m_pointSize > 0, wxT("Point size should not be zero.") );
+
 #ifdef __LP64__
     if ( m_faceName.empty() && m_family == wxDEFAULT )
     {
@@ -330,8 +332,7 @@ void wxFontRefData::MacFindFont()
       };
 
     status = ::ATSUSetAttributes( (ATSUStyle)m_macATSUStyle, attributeCount, atsuTags, atsuSizes, atsuValues);
-
-    wxASSERT_MSG( status == noErr , wxT("couldn't modify ATSU style") );
+    wxASSERT_MSG( status == noErr , wxString::Format(wxT("couldn't modify ATSU style. Status was %d"), (int) status).c_str() );
 #else
     if ( m_macThemeFontID != kThemeCurrentPortFont )
     {