patch 7.4.1828
Problem:    May try to access buffer that's already freed.
Solution:   When freeing a buffer remove it from any channel.
diff --git a/src/version.c b/src/version.c
index 266e591..fb3b3d4 100644
--- a/src/version.c
+++ b/src/version.c
@@ -754,6 +754,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1828,
+/**/
     1827,
 /**/
     1826,