Words with a capital in the \hyphenation block are ignored

[Bjarni Ingi Gislason]

GROFF VERSION:
groff-current from 1st December 2009

MACHINE:
AMD K3 processor (i583)

OS:
Linux 2.6.26

COMPILER:
g++ (Debian 4.3.2-1.1) 4.3.2

INPUT FILES:
.ll 1n
.lg 0
.hla us
.hpf hyphen.us
.hpfa hyphenex.us
Winchester

COMMAND LINE:
test-groff -Z -Ww

DESCRIPTION OF INCORRECT BEHAVIOUR:

  Hyphenation is Winch-es-ter instead of Win-ches-ter according to
the execption case.

  Exceptional hyphenation in the "hyphenex..." files does not
work if the word has a captial initial.

  Works if the word in the "\hyphenation" block begins with
a lower letter.

Output:
x T ps
x res 72000 1 1
x init
p1
x font 5 TR
f5
s10000
V12000
H72000
md
DFd
tW
H81040
tinch
Chy
h3330
n12000 0
V24000
H72000
tes
Chy
h3330
n12000 0
V36000
H72000
tter
n12000 0
x trailer
V792000
x stop

SUGGESTED FIX [optional]:
None