Fix cases where the offset is out of range (javascript parser)

The exception for the "too far" error was not thrown if the offset was bigger
than the buffer length, screwing up the parser. Fix #277

Signed-off-by: DTrejo <[email protected]>

Author: lpinca

lib/parser/javascript.js

@@ -125,12 +125,12 @@ ReplyParser.prototype._parseResult = function (type) {
         for (i = 0; i < packetHeader.size; i++) {
             ntype = this._buffer[this._offset++];
 
-            if (this._offset === this._buffer.length) {
+            if (this._offset > this._buffer.length) {
                 throw new Error("too far");
             }
             res = this._parseResult(ntype);
             if (res === undefined) {
-              res = null;
+                res = null;
             }
             reply.push(res);
         }