scanner: Fix 'destroy)' typo in check for destroy request presence

This is there to enforce that we don't have interfaces with a destroy
request that isn't a destructor.  The check never worked because of the
typo, but we also don't have any interfaces like that.

src/scanner.c

@@ -568,7 +568,7 @@ emit_stubs(struct wl_list *message_list, struct interface *interface)
 	wl_list_for_each(m, message_list, link) {
 		if (m->destructor)
 			has_destructor = 1;
-		if (strcmp(m->name, "destroy)") == 0)
+		if (strcmp(m->name, "destroy") == 0)
 			has_destroy = 1;
 	}