Fix `args-out-of-bounds' error on formatting annotations when
annotation start position is greater than the width of window.

* company.el(company-fill-propertize): Check `ann-start' against
  `width' before adding annotation text properties.

* company-tests.el(company-create-lines-truncates-annotations):
  Add test case.
Merge pull request #70 from sadboy/master

Fix `args-out-of-bounds' error on formatting annotations when annotation start position is greater than the width of window.