Use implicit conversion from wxColour to wxBrush

samples/drawing/drawing.cpp

@@ -1788,7 +1788,7 @@ void MyCanvas::Draw(wxDC& pdc)
             return;
         }
 
-        gdc.SetBackground(wxBrush(GetBackgroundColour(),wxBRUSHSTYLE_SOLID));
+        gdc.SetBackground(GetBackgroundColour());
         gdc.SetGraphicsContext(context);
     }
 

src/osx/carbon/dcclient.cpp

@@ -81,7 +81,7 @@ wxWindowDCImpl::wxWindowDCImpl( wxDC *owner, wxWindow *window )
     }
     DoSetClippingRegion( 0 , 0 , m_width , m_height ) ;
 
-    SetBackground(wxBrush(window->GetBackgroundColour(),wxBRUSHSTYLE_SOLID));
+    SetBackground(window->GetBackgroundColour());
 
     SetFont( window->GetFont() ) ;
 }