K 10
svn:author
V 6
kevans
K 8
svn:date
V 27
2018-02-26T03:46:17.490932Z
K 7
svn:log
V 563
lualoader: A little more general menu cleanup

Instead of a single-letter parameter ('m'), use something a little more
descriptive and meaningful: 'menudef' ("menu definition") -- these functions
expect to be passed a menudef, so call it what it is.

While here, throw an assertion in that we have a handler for the selected
menu item. This is more of a debugging aide so that it's more obvious when
one is testing a menudef that they've added an entry item that we don't
handle.

This is an improvement over the past behavior of ignoring the unknown menu
entry.

END