some optimizations... (inline now speeds up recursive functions a lot)

Rev: src/docode.c:1.69
Rev: src/interpret.c:1.148
Rev: src/interpret_functions.h:1.16
Rev: src/language.yacc:1.181
Rev: src/las.h:1.35
Rev: src/lex.c:1.78
Rev: src/peep.in:1.29
Rev: src/program.c:1.233