patch 8.2.0059: compiler warnings for unused variables in small build

Problem:    Compiler warnings for unused variables in small build. (Tony
            Mechelynck)
Solution:   Add #ifdef.

src/scriptfile.c

@@ -95,11 +95,13 @@ estack_pop(void)
     char_u *
 estack_sfile(void)
 {
+    estack_T	*entry;
+#ifdef FEAT_EVAL
     int		len;
     int		idx;
-    estack_T	*entry;
     char	*res;
     int		done;
+#endif
 
     entry = ((estack_T *)exestack.ga_data) + exestack.ga_len - 1;
     if (entry->es_name == NULL)

src/version.c

@@ -742,6 +742,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    59,
 /**/
     58,
 /**/