fixed len() tips

Author: RocksonZeta

lib/validate.js

@@ -156,8 +156,13 @@ Validator.prototype.isLength = function(min, max, tip) {
 	max = v.isInt(max) ? max :-1;
 	this.exist(tip);
 	if (this.goOn) {
-		if (this.value.length<min || -1!=max&&this.value.length>max) {
-			this.addError(tip || this.key + "'s length equal or great than " + min + (-1 == typeof max ? " and equal or less than " + max + "." : "."));
+		if(this.value.length<min) {
+			this.addError(tip || this.key + "'s length must equal or great than " + min+".");
+			return this;
+		}
+		if (-1!=max&&this.value.length>max) {
+			this.addError(tip || this.key + "'s length must equal or less than " + max + ".");
+			return this;
 		}
 	}
 	return this;