gpgscm: Add flags to the interpreter.
* tests/gpgscm/scheme-private.h (struct scheme): Add field 'flags'. * tests/gpgscm/scheme.c (S_OP_MASK): New macro. (S_FLAG_MASK, s_set_flag, s_clear_flag, s_get_flag): Likewise. (_s_return): Unpack the encoded opcode and flags. (s_save): Encode the flags along with the opcode. Use normal integers to encode the result. (scheme_init_custom_alloc): Initialize 'op' and 'flags'.
- Signed-off-by: Justus Winter <justus@g10code.com>