patch 8.2.4013: build failure without the spell feature

Problem:    Build failure without the spell feature.
Solution:   Adjust #ifdefs.
diff --git a/src/errors.h b/src/errors.h
index ea0b77e..3b765a1 100644
--- a/src/errors.h
+++ b/src/errors.h
@@ -1771,10 +1771,12 @@
 	INIT(= N_("E762: Character in FOL, LOW or UPP is out of range"));
 EXTERN char e_word_characters_differ_between_spell_files[]
 	INIT(= N_("E763: Word characters differ between spell files"));
+#endif
 #if defined(FEAT_SYN_HL) || defined(FEAT_COMPL_FUNC)
 EXTERN char e_option_str_is_not_set[]
 	INIT(= N_("E764: Option '%s' is not set"));
 #endif
+#ifdef FEAT_SPELL
 EXTERN char e_spellfile_does_not_have_nr_entries[]
 	INIT(= N_("E765: 'spellfile' does not have %d entries"));
 #endif
diff --git a/src/version.c b/src/version.c
index 833299e..3fb9262 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4013,
+/**/
     4012,
 /**/
     4011,