supporting SetFont(wxNullFont), fixes #10980

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@61369 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/src/common/dcgraph.cpp b/src/common/dcgraph.cpp
index 481f256d2a6ff1cde6068567f41298b03cc35fab..df722ea5d90575058171ccf221bd851addc7afc4 100644 (file)
--- a/src/common/dcgraph.cpp
+++ b/src/common/dcgraph.cpp
@@ -451,7 +451,7 @@ void wxGCDCImpl::SetFont( const wxFont &font )
             f.SetPointSize( /*LogicalToDeviceYRel*/(font.GetPointSize()));
         m_graphicContext->SetFont( f, m_textForegroundColour );
 #if defined(__WXGTK__) || defined(__WXOSX__)
-        if ( m_font.GetNoAntiAliasing() ) 
+        if ( m_font.IsOk() && m_font.GetNoAntiAliasing() ) 
         {
             m_graphicContext->SetAntialiasMode(wxANTIALIAS_NONE);
         }