fix result_tools skipping answers if they had no text. This caused problems for the histrogram function.
fix result_tools skipping answers if they had no text. This caused problems for the
histrogram function.

breunigs/gnt-eval,breunigs/gnt-eval,breunigs/gnt-eval,breunigs/gnt-eval,breunigs/gnt-eval,breunigs/gnt-eval,breunigs/gnt-eval