Start FB version 1.02
ast: Fix comments in hOptDerefAddr()

It does not optimize out pointer-arithmetic-like BOPs as the comments
indicate, but only folds DEREF(ADDROF(...)) expressions without BOPs in
between.
Fix undefined behaviour in dynamic array copying codegen

The dst/src expressions must be duplicated because they will not only be
used in the fb_ArrayRedimTo() call, but also for the loop that copies the
array elements.