notice and trailing whitespace

I initialized a variable to remove a notice when there are no lists defined and removed trailing whitespace.

I don't generally like to get patches for line ending or whitespace changes, so here is a sed script which will do the trailing whitespace business if you (like me) prefer to do that yourself:

sed -i 's/[ \t]*$//'

There's also an extra space in the indents starting on line 691.

And there's some windows line endings which dos2unix should help (do the sed script after this since it doesn't handle windows line endings).

Note that I didn't fix all of the notices - there are quite a few on the "Add" page. You need to change your includes/common.inc in order to see these. And I didn't clean up all the files...just the module file.