xganim: minor improvements

[hamish]

Hi,

it would be nice if the starting speed for xgamin's cd->speed was a bit slower. increasing it from 100 -> 200000 helps, but locks the program up a bit.

also it would be nice if the buttons were a bit wider, they seem to be compressed a bit.

(yes, I know there are new animation tools in the GUIs, that doesn't mean we shouldn't fix bugs...)

and the gis.m anim tool gives me this error when I exit it:

invalid command name ".animwin.mf.frame.canvas"
invalid command name ".animwin.mf.frame.canvas"
    while executing
"$anim_can delete all"
    (procedure "GmAnim::do_run" line 75)
    invoked from within
"GmAnim::do_run"
    (procedure "GmAnim::cmd_idle" line 8)
    invoked from within
"GmAnim::cmd_idle"
    ("after" script)

Hamish