Ensure that help page manifest is not empty.
authorJohn Darrington <john@darrington.wattle.id.au>
Sun, 21 Aug 2016 12:29:21 +0000 (14:29 +0200)
committerJohn Darrington <john@darrington.wattle.id.au>
Fri, 13 Jan 2017 19:35:46 +0000 (20:35 +0100)
commit5c0ec34670a7d9cfb1abc4cd5b25ccb88de3cbee
tree62703fded09b375b18a77de4d048f92d4c53489d
parentf35e10ab18095e05bb107e58894ff2ada6cd2791
Ensure that help page manifest is not empty.

For some reason I have found that sometimes doc/help-pages-list
is zero bytes long.   I don't know how this happens, but this
change should catch it and allow us to find out why.
src/ui/gui/automake.mk