reached.
* variable.c (rb_obj_remove_instance_variable):  Replaced "not reached"
  comment with the UNREACHABLE macro.
* variable.c (rb_mod_const_missing):  ditto.
* variable.c (rb_mod_remove_cvar):  ditto.
* enum.c (first_i):  ditto.
* string.c (rb_str_aref):  ditto.
* string.c (str_byte_aref):  ditto.
* string.c (rb_to_id):  ditto.
* io.c (rb_io_fmode_modestr):  ditto.
* io.c (rb_io_oflags_modestr):  ditto.
* pack.c (num2i32):  ditto.
* vm_eval.c (rb_method_missing):  ditto.
* vm_eval.c (rb_f_throw):  ditto.
* dir.c (dir_read):  ditto.
* win32/win32.c (child_result):  ditto.
* struct.c (rb_struct_getmember):  ditto.
* struct.c (rb_struct_set):  ditto.
* struct.c (rb_struct_aref_id):  ditto.
* eval.c (rb_f_raise):  ditto.
* process.c (rb_f_exit_bang):  ditto.
* process.c (rb_f_exit):  ditto.
* process.c (rb_f_abort):  ditto.
* ext/-test-/iter/break.c (iter_break_value):  ditto.
* ext/pty/pty.c (pty_check):  ditto.
* ext/openssl/ossl_pkey.c (ossl_pkey_new):  ditto.
* ext/readline/readline.c (rb_remove_history):  ditto.
* ext/stringio/stringio.c (strio_unimpl):  ditto.
* numeric.c (num_sadded):  ditto.
* numeric.c (num_init_copy):  ditto.
* numeric.c (rb_num2ll):  ditto.
* numeric.c (rb_num2ull):  ditto.
* vm_insnhelper.c (call_cfunc):  ditto.
* ruby.c (opt_W_getter):  ditto.
* bignum.c (rb_big_coerce):  ditto.
* file.c (rb_f_test):  ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35322 b2dd03c8-39d4-4d8f-98ff-823fe69b080e