remove default wxDC ctor to make it impossible to construct DCs without the associated wxDCImpl (this breaks compilation of classes such as wxMirrorDC instead of crashing at run-time); fixed wxMirrorDC compilation after breaking it; renamed wxDCFactory::GetFactory() to just Get(), no need to be repetitive

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@50385 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/dcprint.h

@@ -71,8 +71,8 @@ class WXDLLEXPORT wxPrinterDCFromHDC: public wxPrinterDC
 {
 public:
     wxPrinterDCFromHDC( WXHDC theDC )
+        : wxPrinterDC(new wxPrinterDCImpl(this, theDC))
     {
-        m_pimpl = new wxPrinterDCImpl( this, theDC );
     }
 };