#4014 themed nested window demo failure

[Larry W. Virden]

I was looking at the new demos using the tcl/tk 8.6 cvs head from activestate.

First, I noticed that the Knight's tour didn't display a chess piece, but a unicode string - probably depends on some font that I don't have.

However, when I got to the themed nested window demo, I got this error:

time zone ":Europe/Berlin" not found
time zone ":Europe/Berlin" not found
while executing
"return -options $opts $retval"
(procedure "::tcl::clock::format" line 18)
invoked from within
"::tcl::clock::format 0 -timezone :Europe/Berlin"
("uplevel" body line 1)
invoked from within
"uplevel 1 [info level 0]"
(procedure "::tcl::clock::format" line 4)
invoked from within
"clock format 0 -timezone :Europe/Berlin"
("uplevel" body line 1)
invoked from within
"uplevel 1 [info level 0]"
(procedure "clock" line 16)
invoked from within
"clock format 0 -timezone $zone"
("foreach" body line 1)
invoked from within
"foreach zone $zones {clock format 0 -timezone $zone}"
(file "/vol/tclsrcsol/tcl86/tk/library/demos/./ttkpane.tcl" line 70)
invoked from within
"source /vol/tclsrcsol/tcl86/tk/library/demos/./ttkpane.tcl"
("uplevel" body line 1)
invoked from within
"uplevel 1 [list source [file join $tk_demoDirectory $demo.tcl]]"
(procedure "invoke" line 12)
invoked from within
"invoke [.t index {@77,374}]"
(command bound to event)

[Pat Thoyts]

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Tk bug raised in the Tcl project.
I've fixed the timezone stuff to skip over missing timezones. The chess piece is a missing font issue. We should add an image for deprived unix users.