Update extendedApi.js

Author: vitaliylag

lib/extendedApi.js

@@ -11,10 +11,10 @@ All documented and exposed API belongs in here
 
 RedisClient.prototype.send_command_buf = function (command, args, callback) {
     try {
-        this.next_command_use_buf = true;
+        this.next_command_ret_buf = true;
         this.send_command(command, args, callback);
     } finally {
-        this.next_command_use_buf = false; // Set to false even if internal_send_command has not been called or throw
+        this.next_command_ret_buf = false; // Set to false even if internal_send_command has not been called or throw
     }
 };