Update runtime files.
diff --git a/runtime/syntax/c.vim b/runtime/syntax/c.vim
index 95d3455..2eb7881 100644
--- a/runtime/syntax/c.vim
+++ b/runtime/syntax/c.vim
@@ -1,7 +1,7 @@
" Vim syntax file
" Language: C
" Maintainer: Bram Moolenaar <Bram@vim.org>
-" Last Change: 2018 Sep 21
+" Last Change: 2019 Feb 11
" Quit when a (custom) syntax file was already loaded
if exists("b:current_syntax")
@@ -342,7 +342,7 @@
syn keyword cConstant EINPROGRESS EINTR EINVAL EIO EISCONN EISDIR ELOOP EMFILE EMLINK EMSGSIZE
syn keyword cConstant EMULTIHOP ENAMETOOLONG ENETDOWN ENETRESET ENETUNREACH ENFILE ENOBUFS ENODATA
syn keyword cConstant ENODEV ENOENT ENOEXEC ENOLCK ENOLINK ENOMEM ENOMSG ENOPROTOOPT ENOSPC ENOSR
- syn keyword cConstant ENOSTR ENOSYS ENOTCONN ENOTDIR ENOTEMPTY ENOTRECOVERABLE ENOTSOCK ENOTSUP
+ syn keyword cConstant ENOSTR ENOSYS ENOTBLK ENOTCONN ENOTDIR ENOTEMPTY ENOTRECOVERABLE ENOTSOCK ENOTSUP
syn keyword cConstant ENOTTY ENXIO EOPNOTSUPP EOVERFLOW EOWNERDEAD EPERM EPIPE EPROTO
syn keyword cConstant EPROTONOSUPPORT EPROTOTYPE ERANGE EROFS ESPIPE ESRCH ESTALE ETIME ETIMEDOUT
syn keyword cConstant ETXTBSY EWOULDBLOCK EXDEV