Don't include wx/utils.h from wx/vector.h.

Don't include wx/utils.h from wx/vector.h.

This will allow to include wx/vector.h from wx/list.h which is itself included
from wx/utils.h by breaking this circular dependency.

Don't use wxMin(), defined in wx/utils.h, in order to do this.

See #14814.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73002 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775