When an empty DB-value for user-id is being parsed 0 will be returned
and cause crash - fixed by checking for the '0' in the controller and
replacing it with user '13' - Chris Jester-Young.
s06-bugs: Fixed empty DB-value for user-id by toasting.
s06-bugs. Excluding the need of checking 'Post question' in
QuestionController for being NULL.
Merge remote-tracking branch 'origin/s06-bugs' into dev