Fix a couple of compiler bugs. topenv was getting initialized in multiple places. This resulted in multiple copies of modules getting created which caused problems for macro expansion. Additionally, arguments were not being marked as declared during code generation so assigning to an argument that was not closed over generated invalid C code.

#{
	main <- {
		sock <- socket connectTo: "127.0.0.1" onPort: 12345
		sock send: "Hello, Socket!\n"
		response <- sock recv: 1024
		print: (string: response)
		sock close
		0
	}
}