compiler/ml_unify_gen.m:
Do ORs and shifts on argument values being packed using MR_Unsigned.
Cast the results to MR_Box explicitly.
compiler/ml_util.m:
Add utility functions that return (static terms containing) the MLDS
representations of the builtin integer types.
compiler/mlds_to_c_data.m:
Parenthesize values being cast, to ensure that the cast applies
to the *whole* of the value, not just an initial part. (For example,
"(uint32_t) x >> 32" casts just x, not the result of the shift.)
tests/hard_coded/pack_int32.{m,exp}:
A regression test for the bug report that this diff addresses.
tests/hard_coded/Mmakefile:
Add the new test case.
