fn lglsxp_na_error() -> SexpErrorExpand description
NA-rejecting error for a logical (LGLSXP) scalar that holds NA.
The bare integer/float scalar paths must reject NA_logical_ rather than
silently coercing R’s NA_LOGICAL sentinel (i32::MIN) into a finite
number. Mirrors the guard the bare i32 (INTSXP) impl already applies.