[git commit master] include unistd.h for smallint

[Yoshinori Sato]

commit: http://git.uclibc.org/uClibc/commit/?id=0590007b388006a3bfcf8d0929fe8591b9635424
branch: http://git.uclibc.org/uClibc/commit/?id=refs/heads/master

Signed-off-by: Yoshinori Sato <ysato at users.sourceforge.jp>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop at gmail.com>
(cherry picked from commit df9130a0dc1c9e3553fcfee68bb8a809e4f4a458)

Signed-off-by: Carmelo Amoroso <carmelo.amoroso at st.com>
---
 libc/signal/sigwait.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/libc/signal/sigwait.c b/libc/signal/sigwait.c
index 917e3d7..8fd7ea8 100644
--- a/libc/signal/sigwait.c
+++ b/libc/signal/sigwait.c
@@ -22,6 +22,7 @@
 #include <errno.h>
 #include <signal.h>
 #include <string.h>
+#include <unistd.h>
 
 #ifdef __UCLIBC_HAS_THREADS_NATIVE__
 # include <sysdep-cancel.h>
-- 
1.6.3.3