patch 7.4.2304
Problem:    In a timer callback the timer itself can't be found or stopped.
            (Thinca)
Solution:   Do not remove the timer from the list, remember whether it was
            freed.
diff --git a/src/version.c b/src/version.c
index edee28a..b0ee536 100644
--- a/src/version.c
+++ b/src/version.c
@@ -764,6 +764,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2304,
+/**/
     2303,
 /**/
     2302,