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)

src/version.c

@@ -742,6 +742,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    99,
 /**/
     98,
 /**/