(Flength, Felt, Ffillarray): Remove loop around wrong_type_argument.

(Flength, Felt, Ffillarray): Remove loop around wrong_type_argument.
(Fcopy_sequence, concat): Cleanup wrong_type_argument use.
(concat): Use CHECK_NUMBER.
(Felt): Use CHECK_ARRAY.
(Fsubstring, substring_both): Use CHECK_VECTOR_OR_STRING.
(Fmemq): Use CHECK_LIST.
(Fassq, Fassoc, Frassq, Frassoc): Use CAR.
(assq_no_quit): Use CAR_SAFE.
(Fnthcdr, Fmember, Fdelq, Fdelete, Fnreverse, Fnconc):
Use CHECK_LIST_CONS.
(Freverse, Fplist_get, Flax_plist_get): Use CHECK_LIST_END.