patch 7.4.1042

Problem:    g-CTRL-G shows the word count, but there is no way to get the word
            count in a script.
Solution:   Add the wordcount() function. (Christian Brabandt)

runtime/doc/usr_41.txt

@@ -923,6 +923,7 @@ Various:					*various-functions*
 	mzeval()		evaluate |MzScheme| expression
 	py3eval()		evaluate Python expression (|+python3|)
 	pyeval()		evaluate Python expression (|+python|)
+	wordcount()             get byte/word/char count of buffer
 
 ==============================================================================
 *41.7*	Defining a function