interpret_functions.h

langauge.yacc now knows how to pass flags along to o_sscanf().
Updated F_SSCANF opcode to allow for passing of flags to o_sscanf().

Rev: src/docode.c:1.200
Rev: src/interpret_functions.h:1.203
Rev: src/language.yacc:1.422
Rev: src/las.c:1.408
Rev: src/sscanf.c:1.177
Rev: src/sscanf.h:1.3
Rev: src/treeopt.in:1.96