patch 8.2.0099: use of NULL pointer when out of memory

Problem:    Use of NULL pointer when out of memory.
Solution:   Check for NULL pointer. (Dominique Pelle, closes #5449)
diff --git a/src/version.c b/src/version.c
index c466c29..8322eb3 100644
--- a/src/version.c
+++ b/src/version.c
@@ -743,6 +743,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    99,
+/**/
     98,
 /**/
     97,