patch 9.1.0115: Using freed memory with full tag stack and user data

Problem:  Using freed memory with full tag stack and user data
          (Konstantin Khlebnikov)
Solution: Clear the user data pointer of the newest entry.
          (zeertzjq, Konstantin Khlebnikov)

fixes: neovim/neovim#27498
closes: #14053

Co-authored-by: Konstantin Khlebnikov koct9i@gmail.com
Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Konstantin Khlebnikov koct9i@gmail.com
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index bcb1d7c..80cdfbc 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    115,
+/**/
     114,
 /**/
     113,