patch 8.2.0240: using memory after it was freed

Problem:    Using memory after it was freed. (Dominique Pelle)
Solution:   Do not mix converion buffer with other buffer.
diff --git a/src/version.c b/src/version.c
index cf96f40..7eaf24b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -743,6 +743,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    240,
+/**/
     239,
 /**/
     238,