include stdint.h for int32_t/uint32_t

Signed-off-by: Jussi Kukkonen <jussi.kukkonen@intel.com>
Reviewed-by: Yong Bakos <ybakos@humanoriented.com>
diff --git a/tests/ivi_layout-internal-test.c b/tests/ivi_layout-internal-test.c
index bc36ad1..d851ec0 100644
--- a/tests/ivi_layout-internal-test.c
+++ b/tests/ivi_layout-internal-test.c
@@ -30,6 +30,7 @@
 #include <signal.h>
 #include <string.h>
 #include <stdbool.h>
+#include <stdint.h>
 
 #include "compositor.h"
 #include "ivi-shell/ivi-layout-export.h"