Search Error message returned should be a more user friendly wording

[Winnie]

http://upstream.openlibrary.org/
Enter "Joseph Conrad" into search box
Click on "Search"
Search results have titles with Joseph Conrad and Joseph Conrad author books listed
Click on "More Search Options"
Do not enter any data
Click on "Search"

The following error messages are returned:

/templates/work_search.tmpl: error in processing template: UnboundLocalError: local variable 'results' referenced before assignment (falling back to default template)
/opt/openlibrary/staging/openlibrary/plugins/upstream/templates/work_search.html: error in processing template: UnboundLocalError: local variable 'results' referenced before assignment (falling back to default template)
Unable to render this page.

User should be returned a more user friendly message such as "No results with these search criteria" or " Please select search criteria" - discuss with George on exact wording.

[George (george-archive)]

A potentially simpler solution would be to not let an empty form be submitted. (That's that same as a couple of our other interactions, for example, when you try to add a new person to a role. If the box is empty, nothing happens.)

Anand - can you take care of this?

Search forms:
- site-wide search, top right
- main search page
- search subjects (on Subjects page)

[George (george-archive)]

Empty form doesn't make an error now. Good!