patch 7.4.1828

Problem:    May try to access buffer that's already freed.
Solution:   When freeing a buffer remove it from any channel.

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1828,
 /**/
     1827,
 /**/