jsn->jpr_root is allocated using the wrong type

[jordanl]

Reported by Transmission user dhill in downstream ticket: https://trac.transmissionbt.com/ticket/5556

In jsonsl_jpr_match_state_init(), jpr_root is type size_t, but is allocated using sizeof(int).

The line should read:

jsn->jpr_root = calloc(1, sizeof(size_t) * njprs * jsn->levels_max);

[mnunberg]

Thanks for the bug report.

You can submit a pull request for this, or I can change it myself - which one do you prefer?