Executing dr_create_client_thread from dr_client_main

I'm executing `dr_create_client_thread` at the end of `dr_client_main` but the target function did not execute and also `dr_client_main` did not exit, it kind of stuck there.

If I put `dr_messagebox` after `dr_create_client_thread` call, the target function executes and also main exits as expected.

Is it problem to put `dr_create_client_thread` in `dr_client_main`?

The target function only contains `dr_messagebox` call, I'm just playing with DR