Include stddef.h for size_t type

Change-Id: Ie2a56f31318d7abf00c69b2bd47e328e95f479d5
Signed-off-by: Suyeon Hwang <stom.hwang@samsung.com>

diff --git a/include/stt.h b/include/stt.h
index 83290ef..501deb1 100755 (executable)
--- a/include/stt.h
+++ b/include/stt.h
@@ -19,6 +19,7 @@
 #define __STT_H__
 
 
+#include <stddef.h>
 #include <tizen.h>