Added wxCommandEvent::IsSeection for listbox,

Applied patch for wxListBox::Set when sorting
  Added new value rounding code (corrected for
    negative values) to scrollbar and slider
  Added ...TEXT_CHANGED event to wxSpinCtrl


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@8928 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk1/dcclient.cpp

@@ -415,6 +415,7 @@ bool wxWindowDC::DoGetPixel( wxCoord x1, wxCoord y1, wxColour *col ) const
     memdc.SelectObject(bitmap);
     memdc.Blit(0, 0, 1, 1, (wxDC*) this, x1, y1);
     memdc.SelectObject(wxNullBitmap);
+    
     wxImage image(bitmap);
     col->Set(image.GetRed(0, 0), image.GetGreen(0, 0), image.GetBlue(0, 0));
     return TRUE;