updated for version 7.4.038
Problem:    Using "zw" and "zg" when 'spell' is off give a confusing error
	    message. (Gary Johnson)
Solution:   Ignore the error when locating the word.  Explicitly mention what
	    word was added. (Christian Brabandt)
Added tag v7-4-038 for changeset 6daa78b6b99a