updated for version 7.3.1199
Problem:    When evaluating 'foldexpr' causes an error this is silently
	    ignored and evaluation is retried every time.
Solution:   Set emsg_silent instead of emsg_off. Stop evaluating 'foldexpr' is
	    it is causing errors.  (Christian Brabandt)
Added tag v7-3-1199 for changeset be2973afe770