fix inconsistency in socket con/destructor

src/socket.c

@@ -44,7 +44,7 @@ socketCtor(void * _this, va_list * params)
 	this->type      = 0;
 	this->handle    = -1;
 	this->log       = va_arg(*params, TR_Logger);
-	this->host      = va_arg(*params, char*);
+	this->host      = TR_strdup(va_arg(*params, char*));
 	this->port      = va_arg(*params, int);
 	this->flags     = va_arg(*params, int);
 	this->fin_state = TR_FIN_RDWR;
@@ -58,6 +58,7 @@ socketDtor(void * _this)
 {
 	TR_Socket this = _this;
 
+	TR_MEM_FREE(this->host);
 	TR_MEM_FREE(this->cname);
 
 	if (STDERR_FILENO < this->handle) {