wxBitmapComboBoxBase uses wxArrayPtrVoid, so we need to #include "wx/dynarray.h". This fixes a compile error in situations where wx/dynarray.h is not implicitly included through other headers, e.g. when building wx with many features disabled.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_3_0_BRANCH@76892 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775