- fix wxAnimationCtrl::SetBackgroundColour both for generic and native GTK

version
- fix wxAnimationCtrl::GetAnimation for GTK version (modifying correctly the
  constructor which takes a GdkPixbufAnimation)
- fix the generic wxAnimationCtrl::SetAnimation() when it's used with a
  wxNullAnimation.
- moves the frame counter reset in Stop() as it's more sensed to always have
  m_currentFrame cleared immediately when the animation has been stopped
- fix a problem with transparent bitmaps drawing in wxAnimationCtrl::OnPaint

(part of patch 1598005)


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@43475 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/animate.h

@@ -27,7 +27,7 @@ typedef struct _GdkPixbufAnimationIter GdkPixbufAnimationIter;
 class WXDLLIMPEXP_ADV wxAnimation : public wxAnimationBase
 {
 public:
-    wxAnimation(GdkPixbufAnimation *p = NULL) { m_pixbuf = p; }
+    wxAnimation(GdkPixbufAnimation *p = NULL);
     wxAnimation(const wxAnimation&);
     ~wxAnimation() { UnRef(); }