Lost parameter value with replaceable/redeclare

[Henrik Tidefelt]

Repeating the model in #1060, but without making the parameter protected:

class C1
  replaceable parameter Real r=3.14;
end C1;
model C2
  replaceable parameter C1 x1(redeclare replaceable Real r=3);
end C2;

This should be valid, and simulating C2 should result in the parameter x1.r having the value 3.

However, the parameter value is lost when instantiating C2:

class C2
  parameter Real x1.r;
end C2;

[Adrian Pop]

Fixed in r22600 (well, earlier but now there are tests for it).