Update runtime files.
diff --git a/runtime/syntax/c.vim b/runtime/syntax/c.vim
index 7a58ae7..d991540 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: 2013 Jul 05
+" Last Change: 2014 May 26
" Quit when a (custom) syntax file was already loaded
if exists("b:current_syntax")
@@ -322,6 +322,9 @@
syn keyword cConstant SEEK_CUR SEEK_END SEEK_SET
syn keyword cConstant TMP_MAX stderr stdin stdout
syn keyword cConstant EXIT_FAILURE EXIT_SUCCESS RAND_MAX
+ " POSIX 2001
+ syn keyword cConstant SIGBUS SIGPOLL SIGPROF SIGSYS SIGURG
+ syn keyword cConstant SIGVTALRM SIGXCPU SIGXFSZ
" Add POSIX errors as well
syn keyword cConstant E2BIG EACCES EAGAIN EBADF EBADMSG EBUSY
syn keyword cConstant ECANCELED ECHILD EDEADLK EDOM EEXIST EFAULT