patch 8.2.4073: Coverity warns for using NULL pointer

Problem:    Coverity warns for using NULL pointer.
Solution:   Bail out when running out of memory. Check for running over end of
            a string.

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4073,
 /**/
     4072,
 /**/