fix firefox compatibility issue with buffertools#compare

Block.js

@@ -195,7 +195,7 @@ Block.prototype.checkMerkleRoot = function checkMerkleRoot(txs) {
     throw new VerificationError('No merkle root');
   }
 
-  if (buffertools.compare(this.calcMerkleRoot(txs), this.merkle_root) !== 0) {
+  if (buffertools.compare(this.calcMerkleRoot(txs), new Buffer(this.merkle_root)) !== 0) {
     throw new VerificationError('Merkle root incorrect');
   }
 

Transaction.js

@@ -46,7 +46,9 @@ TransactionIn.prototype.getScript = function getScript() {
 
 TransactionIn.prototype.isCoinBase = function isCoinBase() {
   if (!this.o) return false;
-  return buffertools.compare(this.o, COINBASE_OP) === 0;
+
+  //The new Buffer is for Firefox compatibility
+  return  buffertools.compare(new Buffer(this.o), COINBASE_OP) === 0;
 };
 
 TransactionIn.prototype.serialize = function serialize() {

test/test.Block.js

@@ -84,7 +84,7 @@ describe('Block', function() {
 
     var b = getBlock();
     b.getMerkleTree(b.txs).length.should.equal(45);
-    bitcore.buffertools.toHex(b.calcMerkleRoot(b.txs)).should.equal(bitcore.buffertools.toHex(b.merkle_root));
+    bitcore.buffertools.toHex(b.calcMerkleRoot(b.txs)).should.equal(bitcore.buffertools.toHex(new Buffer(b.merkle_root)));
 
     b.checkMerkleRoot(b.txs);
 
@@ -177,7 +177,6 @@ describe('Block', function() {
 
   });
 
-
   it('#createCoinbaseTx should create a tx', function() {
     var b = new Block();
     var pubkey = new Buffer('02d20b3fba521dcf88dfaf0eee8c15a8ba692d7eb0cb957d5bcf9f4cc052fb9cc6');