Branches: main, 10.04
When a foreign_proc output variable of type `char' is assigned to an
MR_Word variable, it must first be cast to an MR_UnsignedChar to prevent
sign-extension of 8-bit character values. This was documented in
mercury_string.h.
Fixes bug #158.
compiler/llds_out_instr.m:
As above.
tests/hard_coded/Mmakefile:
tests/hard_coded/char_signed.exp:
tests/hard_coded/char_signed.m:
Add test case.
