clients: Use zalloc

Signed-off-by: Bryce Harrington <bryce@osg.samsung.com>
diff --git a/clients/simple-dmabuf-intel.c b/clients/simple-dmabuf-intel.c
index 0ceefeb..2ac2200 100644
--- a/clients/simple-dmabuf-intel.c
+++ b/clients/simple-dmabuf-intel.c
@@ -40,6 +40,7 @@
 #include <drm_fourcc.h>
 
 #include <wayland-client.h>
+#include "shared/zalloc.h"
 #include "xdg-shell-unstable-v5-client-protocol.h"
 #include "fullscreen-shell-unstable-v1-client-protocol.h"
 #include "linux-dmabuf-unstable-v1-client-protocol.h"
@@ -310,7 +311,7 @@
 	int i;
 	int ret;
 
-	window = calloc(1, sizeof *window);
+	window = zalloc(sizeof *window);
 	if (!window)
 		return NULL;