K 10
svn:author
V 6
kevans
K 8
svn:date
V 27
2019-10-21T20:09:43.259017Z
K 7
svn:log
V 398
lualoader: don't botch disabling of color

When colors are disabled, color.escape{fg,bg} would return the passed in
color rather than the proper ANSI sequence for the color.
color.escape{fg,bg} would be wrong.

Instead return '', as the associated reset* functions will also return ''.
This should get rid of the funky '2' and '4' in the kernel selector if
you're booting serial.

Reported by:	npn

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