Override FromDIP in wxSVGFileDC and wxPostScriptDC

These are DPI independent.

include/wx/dcsvg.h

@@ -248,6 +248,11 @@ private:
 
     virtual wxSize GetPPI() const wxOVERRIDE;
 
+    virtual wxSize FromDIP(const wxSize& sz) const wxOVERRIDE
+    {
+        return sz;
+    }
+
     void Init(const wxString& filename, int width, int height,
               double dpi, const wxString& title);
 

include/wx/generic/dcpsg.h

@@ -76,6 +76,11 @@ public:
     // Resolution in pixels per logical inch
     wxSize GetPPI() const wxOVERRIDE;
 
+    virtual wxSize FromDIP(const wxSize& sz) const wxOVERRIDE
+    {
+        return sz;
+    }
+
     virtual void ComputeScaleAndOrigin() wxOVERRIDE;
 
     void SetBackgroundMode(int WXUNUSED(mode)) wxOVERRIDE { }