Fix bug 261333.  Use the modulus length for the length of the output buffer, not the length of the input data.  r=julien.pierre
Fix bug 261333.  Use the modulus length for the length of the output
buffer, not the length of the input data.  r=julien.pierre

thespooler/nss,thespooler/nss,thespooler/nss,thespooler/nss,thespooler/nss,thespooler/nss,thespooler/nss