Use "wxWindows licence" and not "wxWidgets licence" (the latter doesn't
exist) and consistently spell "licence" using British spelling.
See #12165.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@64940 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Define element_type for consistency with other classes (wxSharedPtr, weak_ptr)
and to allow accessing the type from the template code.
Also remove the apparently unnecessary template assignment operator:
assignment from an expression convertible to type T* works even without it and
while assigning something implicitly convertible to T* wouldn't work now, it's
for the best as we don't want to rely on such implicit conversions.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@63933 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
