fix type for effects (clo1)

now:
/home/chrisats/dev/ats-simple-explore/hello.dats: 835(line=45, offs=11) -- 925(line=49, offs=6): INTERNAL ERROR (ats_ccomp_trans): ccomp_exp_tmpvar: hie0 = HIElaminit(; HIEseq(HIEapp(HITfun(fun; HITextype(ats_ptr_type; ), ...; HITextype(ats_void_type; )); HIEcst(printf); HIEstring(...), HIEvar(x), HIEapp(HITfun(fun; HITextype(ats_double_type; ); HITextype(ats_double_type; )); HIEvar(mysqrt); HIEvar(x))), HIEapp(HITfun(fun; ; HITextype(ats_void_type; )); HIEcst(print_newline); )))