nsiproxy: Fix use after free in icmp_send_echo (scan-build).

dlls/nsiproxy.sys/icmp_echo.c

@@ -656,8 +656,8 @@ NTSTATUS icmp_send_echo( void *args )
     if (ret < 0)
     {
         TRACE( "sendto() rets %d errno %d\n", ret, errno );
-        icmp_data_free( data );
         params->reply_len = data->ops->set_reply_ip_status( errno_to_ip_status( errno ), params->bits, params->reply );
+        icmp_data_free( data );
         return STATUS_SUCCESS;
     }