add missing dynarray.h includes (patch 1702312) [backport from HEAD]

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@45563 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/anidecod.h

@@ -17,6 +17,7 @@
 #include "wx/stream.h"
 #include "wx/image.h"
 #include "wx/animdecod.h"
+#include "wx/dynarray.h"
 
 
 class /*WXDLLEXPORT*/ wxANIFrameInfo;

include/wx/gifdecod.h

@@ -18,6 +18,7 @@
 #include "wx/stream.h"
 #include "wx/image.h"
 #include "wx/animdecod.h"
+#include "wx/dynarray.h"
 
 // internal utility used to store a frame in 8bit-per-pixel format
 class GIFImage;