[WWcvs] pg: Make sure inherited formulas get the right variables

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

Log Message:
-----------
Make sure inherited formulas get the right variables

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

Revision Data
-------------
Index: Formula.pm
===================================================================
RCS file: /webwork/cvs/system/pg/lib/Value/Formula.pm,v
retrieving revision 1.67
retrieving revision 1.68
diff -Llib/Value/Formula.pm -Llib/Value/Formula.pm -u -r1.67 -r1.68
--- lib/Value/Formula.pm
+++ lib/Value/Formula.pm
@@ -227,6 +227,7 @@
   my $self = shift; my $tree = $self->{tree};
   $self = $self->SUPER::inherit(@_);
   $self->{tree} = $tree->copy($self);
+  $self->{variables} = $tree->getVariables;
   return $self;
 }