ibmtts: getting garbage when switching punctuationmode

[Halim Sahin]

hi Chriss,
I need more time with your last punctuationpatch for testing :-).
However I can confirm that ibmttts produces garbage when switching the
punctuationmode.

Testcase with spd-say:

1. call: spd-say -o ibmtts hello
Result: `pf0hello

2. call: spd-say -o ibmtts hello
Result: hello

3. call: spd-say -o ibmtts -m all hello
Result: `pf1hello

4. call: spd-say -o ibmtts hello
Result: `pf0hello

I can't tell which patch has introduced this bug.

May you can help with this problem as well?
Thx.
Halim