Return if there are no tokens in the post. Fixes ticket #955.  Test case for white space only in a post should be attached.
Return if there are no tokens in the post. Fixes ticket #955.  Test case for white space only in a post should be attached.

Props to mchampanis for the patch.

git-svn-id: d0e296eae3c99886147898d36662a67893ae90b2@3523 653ae4dd-d31e-0410-96ef-6bf7bf53c507

dragonmantank/Habari,dragonmantank/Habari,dragonmantank/Habari