Minor(ish) changes to PsppireValueEntry

[John Darrington]

The attached patch makes some changes to PsppireValueEntry - a few bugs,
a few cleanups where I thought the code was hard to follow, and a few
improvements.  Hopefully all self explanitary.

It also uses this widget in the state variable entry of the ROC dialog. 

Comments before I push it?

-- 
PGP Public key ID: 1024D/2DE827B3 
fingerprint = 8797 A26D 0854 2EAB 0285  A290 8A67 719C 2DE8 27B3
See http://keys.gnupg.net or any PGP keyserver for public key.

0001-Fixed-some-issues-with-the-PsppireValueEntry-and-use.patch
Description: Text Data

signature.asc
Description: Digital signature