fix possible buffer size overflow in lsx_make_lpf() (CVE-2019-8354)
fix possible buffer size overflow in lsx_make_lpf() (CVE-2019-8354)

The multiplication in the size argument malloc() might overflow,
resulting in a small buffer being allocated.  Use calloc() instead.

uklauer/sox,uklauer/sox,uklauer/sox,uklauer/sox