reduce cost of initializing 'batch' in ProcessInternal by 8% when isSignleRpc is true
reduce cost of initializing 'batch' in ProcessInternal by 8% when isSignleRpc is true

artnim/JSON-RPC.NET,artnim/JSON-RPC.NET,steve600/JSON-RPC.NET,steve600/JSON-RPC.NET,Astn/JSON-RPC.NET,KAAndrey/JSON-RPC.NET,KAAndrey/JSON-RPC.NET,dawesc/JSON-RPC.NET,Astn/JSON-RPC.NET,Astn/JSON-RPC.NET,dawesc/JSON-RPC.NET,artnim/JSON-RPC.NET,steve600/JSON-RPC.NET,KAAndrey/JSON-RPC.NET,dawesc/JSON-RPC.NET