ccan: Change vsprintfs to vsnprintfs

Author: sangbida

ccan/ccan/json_out/json_out.c

@@ -9,7 +9,7 @@ struct json_out {
 	/* Callback if we reallocate. */
 	void (*move_cb)(struct json_out *jout, ptrdiff_t delta, void *arg);
 	void *cb_arg;
-	
+
 #ifdef CCAN_JSON_OUT_DEBUG
 	/* tal_arr of types ( or [ we're enclosed in.  NULL if oom. */
 	char *wrapping;
@@ -246,7 +246,7 @@ bool json_out_addv(struct json_out *jout,
 		dst = mkroom(jout, fmtlen + 1 + (int)quote*2);
 		if (!dst)
 			goto out;
-		vsprintf(dst + quote, fmt, ap2);
+		vsnprintf(dst + quote, fmtlen + 1, fmt, ap2);
 	}
 
 #ifdef CCAN_JSON_OUT_DEBUG