patch 8.2.2326: build error with +eval feature but without +spell

Problem:    Build error with +eval feature but without +spell.
Solution:   Adjust #ifdef. (John Marriott)
diff --git a/src/mbyte.c b/src/mbyte.c
index a4eff78..bafab87 100644
--- a/src/mbyte.c
+++ b/src/mbyte.c
@@ -4299,7 +4299,7 @@
     return count;
 }
 
-#if defined(FEAT_SPELL) || defined(PROTO)
+#if (defined(FEAT_SPELL) || defined(FEAT_EVAL)) || defined(PROTO)
 /*
  * Like mb_charlen() but for a string with specified length.
  */
diff --git a/src/version.c b/src/version.c
index 764d09d..63549a2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2326,
+/**/
     2325,
 /**/
     2324,