patch 8.2.2448: compilation error with Ruby 3.0

Problem:    Compilation error with Ruby 3.0.
Solution:   Adjust #ifdefs and declaration. (Ken Takata, closes #7761)
diff --git a/src/version.c b/src/version.c
index 61acfad..5a89933 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2448,
+/**/
     2447,
 /**/
     2446,