eloop: Clear timeout data during allocation

Better make sure the eloop_timeout data gets fully initialized. The
current code is filling in all the fields, but it is clearer to just
zero the buffer to make sure any new field added to the structure gets
initialized.

src/utils/eloop.c

@@ -301,7 +301,7 @@ int eloop_register_timeout(unsigned int secs, unsigned int usecs,
 {
 	struct eloop_timeout *timeout, *tmp;
 
-	timeout = os_malloc(sizeof(*timeout));
+	timeout = os_zalloc(sizeof(*timeout));
 	if (timeout == NULL)
 		return -1;
 	if (os_get_time(&timeout->time) < 0) {