Error indexing a vector with a local variable

[pnbabu]

Indexing a vector with an uninitialized local variable in the update block results in an error. For example,

update:
    j integer
    for j in 0 ... n step 1:
        x[j] = 99.0               ## doesn't work

In this case, although the variable j is not initialized, the vector indexing should work as j should get the values from the loop. The documentation on the semantics of a local variable needs to be updated as well.

[med-ayssar]

Hey @pnbabu, I just tested this behaviour (current master) and got no errors.