Reported by ars3nly as "#1250: Repeating #sit causes a sitting loop",
with a followup comment describing how to reproduce easily, and by
Umbire as "#1229: Curses and extended command menus". Repeat count
from previous command carried over to current command when ^A was
used to re-run the current one.
Reset 'last_command_count' every time a repeat count is obtained,
even when the new one is 0. This is a much simpler fix than what
was used with several previous attempts, but it seems to be working.
The do-again code is convoluted, but the tricky bit was the fact
that this problem only happened when number_pad was On with repeat
counts entered as 'n<digits>'. I still don't understand that aspect,
but it wasn't happening for count of simple '<digits>', making
reproducing it by someone who doesn't use number_pad be difficult....
Closes#1229Closes#1250