Enhancement of fix for bug #98. Refuses submission of search form if search terms are empty. This avoids an internal server error.
Enhancement of fix for bug #98. Refuses submission of search form if
search terms are empty. This avoids an internal server error.

genenetwork/genenetwork2_diet,genenetwork/genenetwork2_diet,genenetwork/genenetwork2_diet,genenetwork/genenetwork2_diet,genenetwork/genenetwork2_diet