FIX: Make node-bitcoin compatable with browserify

lib/jsonrpc.js

@@ -66,15 +66,19 @@ Client.prototype.call = function(method, params, callback, errback, path) {
     errback(err);
   }, this.opts.timeout || 30000);
 
-  // set additional timeout on socket in case of remote freeze after sending headers
-  request.setTimeout(this.opts.timeout || 30000, function() {
-    if (cbCalled) return;
-    cbCalled = true;
-    request.abort();
-    var err = new Error('ESOCKETTIMEDOUT')
-    err.code = 'ESOCKETTIMEDOUT'
-    errback(err);
-  });
+  // set additional timeout on socket in case of remote freeze after sending 
+  // header. NOTE: this method does not exist currently inside browserify
+  // http, which causes a crash
+  if (request.setTimeout) {
+    request.setTimeout(this.opts.timeout || 30000, function() {
+      if (cbCalled) return;
+      cbCalled = true;
+      request.abort();
+      var err = new Error('ESOCKETTIMEDOUT')
+      err.code = 'ESOCKETTIMEDOUT'
+      errback(err);
+    });
+  }
 
   request.on('error', function(err) {
     if (cbCalled) return;