MONDRIAN: make ParameterImpl ctor public. This is needed because JPivot must create new ParameterExpr() in order to restore expression trees stored in bookmarks. This is similar to MemberExpr() etc which must be created too.
MONDRIAN: make ParameterImpl ctor public. This is needed because JPivot must create new ParameterExpr() in order to restore expression trees stored in bookmarks. This is similar to MemberExpr() etc which must be created too.

[git-p4: depot-paths = "//open/mondrian/": change = 8051]

inevo/mondrian,inevo/mondrian