[BUGFIX] Also crop when maxCharacters < first word

When maxCharacters is equal or less then the length of the first word,
the whole string was returned when 'crop to word' is enabled instead of
the only the cropped part.

Change-Id: I0a7ec720b12a7999245b183f36daff5cdd7a8ace
Resolves: #25368
Reviewed-on: http://review.typo3.org/1274
Reviewed-by: Steffen Gebert
Tested-by: Steffen Gebert