fix argument handling bug in fl_map1 need to pop after _applyn; functions might rewrite the stack to contain non-values.
fix argument handling bug in fl_map1
need to pop after _applyn; functions might rewrite the stack to
contain non-values.

MikeBeller/femtolisp,dcurrie/femtolisp,dcurrie/femtolisp,KDr2/femtolisp,MikeBeller/femtolisp,dcurrie/femtolisp,MikeBeller/femtolisp,KDr2/femtolisp,MikeBeller/femtolisp,KDr2/femtolisp