Return face name from wxFont::GetNativeFontInfo() under MSW.

Retrieve the face name from the system if we don't have it already before
returning the native font info.

This fixes the currently failing font unit tests.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@62716 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/font.cpp

@@ -289,7 +289,14 @@ public:
     }
 
     const wxNativeFontInfo& GetNativeFontInfo() const
-        { return m_nativeFontInfo; }
+    {
+        // ensure that we have a valid face name in our font information:
+        // GetFaceName() will try to retrieve it from our HFONT and save it if
+        // it was successful
+        (void)GetFaceName();
+
+        return m_nativeFontInfo;
+    }
 
     void SetNativeFontInfo(const wxNativeFontInfo& nativeFontInfo)
     {