PR fortran/43829
* resolve.c (gfc_resolve_index): Wrap around ...
(gfc_resolve_index_1): ... this. Add parameter to allow
any integer kind index type.
(resolve_array_ref): Allow any integer kind for the start
index of an array ref.
* gfortran.dg/vector_subscript_6.f90: New testcase.
* gfortran.dg/assign_10.f90: Adjust.