malloc + memset -> zalloc

And for clients using the xmalloc helper, use xzalloc.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
diff --git a/clients/image.c b/clients/image.c
index 1f3c77c..4d3f3b8 100644
--- a/clients/image.c
+++ b/clients/image.c
@@ -358,10 +358,9 @@
 	struct image *image;
 	char *b, *copy, title[512];;
 
-	image = malloc(sizeof *image);
+	image = zalloc(sizeof *image);
 	if (image == NULL)
 		return image;
-	memset(image, 0, sizeof *image);
 
 	copy = strdup(filename);
 	b = basename(copy);