where calling term_start_color(NO_COLOR) would have the same
effect as calling term_end_color().
That change only included a change for termcap, but not any of
the NO_TERMS configurations. (NO_TERMS is defined for an
implementation where termcap is not used).
This attempts to make sys/msdos/video.c and sys/windows/consoletty.c
honor the change.
The msdos change has not yet been tested.
No attempt was made to alter the term_start_color() implementations
within the outdated tree.
e639c4bdaa