Another wrong outcome of autodeclared index dimension

[mgerlach-phys]

This may be related to #324.

Declaring a dimension of autodeclared indices with "autodeclare" leads to strange results.
As seen with the following program:

*autodeclare symbol a;
*autodeclare symbol a, b;
*autodeclare symbol a, b, c;

autodeclare symbol N;
autodeclare index randomIndex=N1;

local A = d_(randomIndex1,randomIndex2)*d_(randomIndex1,randomIndex2);

print +s;
.end

This program gives pi_.
Uncommenting one of the first three lines results in other random internal used parameter, such as coeff_, num_ or den_.