SpinBox fails when Tile is active.

% package require BWidget
1.9.13
% Widget::theme 1
1
% SpinBox .sb
can't read "classopt(-disabledforeground)": no such element in array

Workaround patch which avoids the runtime error:

diff -b spinbox.tcl spinbox.tcl_orig
42d41
<     if {! $::Widget::_theme} {
51c50
<     }
---
>
69,71d67
<     if {$::Widget::_theme} {
<         set entry [eval [list Entry::create $path.e] $maps(.e)]
<     } else {
73d68
<     }