scrooloose/syntastic — pull request #223 by Fruneau (2012-03-28 17:51:21+00:00)
Title: Only keep "valid" entries in the error count.

The location list returned by getloclist() may contain entries that are
not errorformat matches. By "definition", (see :help getqflist), matched
lines have the attribute "valid": 1 set, so only keep those lines in
error/warning list to avoid erroneous counts and strange behaviors.