Initialize _canPush to false in readable streams

Author: fbbdev

lib/streams.js

@@ -38,7 +38,7 @@ function InputStream() {
     stream.Readable.call(this);
 
     this._buffer = [];
-    this._canPush = true;
+    this._canPush = false;
 }
 util.inherits(InputStream, stream.Readable);
 
@@ -148,7 +148,7 @@ function IOStream(conn, id, recordType) {
     this.recordType = recordType || fcgi.records.StdOut;
 
     this._buffer = [];
-    this._canPush = true;
+    this._canPush = false;
 
     this._conn = conn;
     this._id = id;