Spotted by Adam Martinson.

Strictly speaking the texture doesn't get unloaded, but it does get associated
with a different surface. The FBO cache in particular is much happier when it
gets notified of these.

Type qualifiers have only a meaning for lvalues.

comctl32/treeview: Use a code set by dispinfo holder to convert data encoding after TVN_GETDISPINFO.

comctl32/listview: Use a code set by dispinfo holder to convert data encoding after LVN_GETDISPINFO.