don't use GetSelectedInto() in release build

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@19460 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/dcmemory.cpp

@@ -110,7 +110,7 @@ void wxMemoryDC::SelectObject(const wxBitmap& bitmap)
     }
 
     // check for whether the bitmap is already selected into a device context
-    wxCHECK_RET( !bitmap.GetSelectedInto() ||
+    wxASSERT_MSG( !bitmap.GetSelectedInto() ||
                   (bitmap.GetSelectedInto() == this),
                   wxT("Bitmap is selected in another wxMemoryDC, delete the first wxMemoryDC or use SelectObject(NULL)") );