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/desktop-shell/exposay.c b/desktop-shell/exposay.c
index f05fa4c..b11a7f7 100644
--- a/desktop-shell/exposay.c
+++ b/desktop-shell/exposay.c
@@ -25,6 +25,7 @@
 
 #include "config.h"
 
+#include <stdint.h>
 #include <linux/input.h>
 
 #include "shell.h"