Bug 341127: Fix the remaining invalid read in rc4_wordconv. r=sleevi.
Bug 341127: Fix the remaining invalid read in rc4_wordconv. r=sleevi.

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