storage/maria/ma_open.c:352:7: runtime error: call to function debug_sync(THD*, char const*, unsigned long)
through pointer to incorrect function type 'void (*)(void *, const char *, unsigned long)'
The THD argument is a void *. Because of the way myisam is .c files the
function prototype is mismatched.
As Marko pointed out the MYSQL_THD is declared as void * in C.
Thanks Jimmy Hú for noting that struct THD is the equalivalant in C to
the class THD. The C NULL was also different to the C++ nullptr.
Corrected the definations of MYSQL_THD and DEBUG_SYNC_C to be C and C++
compatible.
