patch 7.4.2026
Problem:    Reference counting for callbacks isn't right.
Solution:   Add free_callback(). (Ken Takata)  Fix reference count.
diff --git a/src/version.c b/src/version.c
index 67f8b65..a7a9a8b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -759,6 +759,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2026,
+/**/
     2025,
 /**/
     2024,