#49 HashMgr::add_word computes wrong size for struct hentry

[Anders Kaseorg]

This was found by Konstantin Khlebnikov:
https://bugs.launchpad.net/ubuntu/+source/seamonkey/+bug/723830/comments/6
In HashMgr::add_word, descl was computed as sizeof(short) in the desc && aliasm case, but store_pointer writes a char *, not a short.

[Anders Kaseorg]