* src/posix-lock.c (gpgrt_lock_init): Detect unitialized lock var.
* src/w32-lock.c (gpgrt_lock_init): Ditto.

gpgrt_lock_t *lock = xcalloc (1, sizeof *lock);
gpgrt_lock_init (lock);
gpgrt_lock_lock (lock);
foo ();
gpgrt_lock_unlock (lock);
gpgrt_lock_destroy (lock);
free (lock);