Fixed issue 03940: PHP error when running a a survey with conditions based on Tokens but no token table exists.
Fixed unreported issue: issue when a survey doesn't display any question due to conditions (based on tokens).
Dev: the last issue may not be completely fixed cause there is no end-page after the auto-submit, but at least there is no php error anymore

git-svn-id: file:///Users/Shitiz/Downloads/lssvn/source/limesurvey@8180 b72ed6b6-b9f8-46b5-92b4-906544132732