some fixes for auto_bignum stuff Rev: lib/master.pike.in:1.59 Rev: src/bignum.c:1.2 Rev: src/bignum.h:1.3 Rev: src/builtin_functions.c:1.184 Rev: src/language.yacc:1.125 Rev: src/main.c:1.77 Rev: src/operators.c:1.62 Rev: src/program.c:1.158