mgmt_new_default sometimes fail

[Ordit Gross <ordit.gross@xxxxxxxxx>]

hi all,
On our application we used the code sample btmgmt.c
which uses mgmt_new_default, this function will fail if
fd >127 (because mainloop_add_fd will fail in io_new function).

mgmt_new_default:
fd = socket(PF_BLUETOOTH, SOCK_RAW | SOCK_CLOEXEC | SOCK_NONBLOCK, BTPROTO_HCI);

what is the best way to workaround this issue assuming I have only
btmgmt.c code and would rather not change other files?

thanks in advance
Ordit