[WWcvs] pg: Add a predefined type structure for intervals.

[dpvc v. a. <we...@ma...>]

Log Message:
-----------
Add a predefined type structure for intervals.

Modified Files:
--------------
    pg/lib:
        Value.pm

Revision Data
-------------
Index: Value.pm
===================================================================
RCS file: /webwork/cvs/system/pg/lib/Value.pm,v
retrieving revision 1.88
retrieving revision 1.89
diff -Llib/Value.pm -Llib/Value.pm -u -r1.88 -r1.89
--- lib/Value.pm
+++ lib/Value.pm
@@ -591,6 +591,7 @@
   complex  => Value::Type('Number',2),
   string   => Value::Type('String',1),
   infinity => Value::Type('Infinity',1),
+  interval => Value::Type('Interval',2),
   unknown  => Value::Type('unknown',0,undef,list => 1)
 );