use decorate on gt and lt

lib/browser/Bignum.js

@@ -85,28 +85,22 @@ function decorate(name) {
   bnjs.prototype[name] = f;
 };
 
+_bnjs.prototype.gt = function(b) {
+  return this.cmp(b) > 0;
+};
+
+_bnjs.prototype.lt = function(b) {
+  return this.cmp(b) < 0;
+};
+
 decorate('add');
 decorate('sub');
 decorate('mul');
 decorate('mod');
 decorate('div');
 decorate('cmp');
-
-bnjs.prototype.gt = function(b) {
-  if (typeof b === 'string')
-    b = new _bnjs(b);
-  else if (typeof b === 'number')
-    b = new _bnjs(b.toString());
-  return this.cmp(b) > 0;
-};
-
-bnjs.prototype.lt = function(b) {
-  if (typeof b === 'string')
-    b = new _bnjs(b);
-  else if (typeof b === 'number')
-    b = new _bnjs(b.toString());
-  return this.cmp(b) < 0;
-};
+decorate('gt');
+decorate('lt');
 
 bnjs.prototype.toNumber = function() {
   return parseInt(this['toString'](10), 10);