Added better handling of QueryFailure flag

Author: christkv

lib/mongodb/cursor.js

@@ -735,6 +735,12 @@ var getMore = function(self, options, callback) {
  return callback(utils.toError(err), null);
  }
 
+ // If the QueryFailure flag is set
+ if((result.responseFlag & (1 << 1)) != 0) {
+ self.state = Cursor.CLOSED;
+ return callback(utils.toError("QueryFailure flag set on getmore command"), null);
+ }
+
  try {
  var isDead = 1 === result.responseFlag && result.cursorId.isZero();