patch 8.2.5051: check for autocmd_add() event argument is confusing

Problem:    Check for autocmd_add() event argument is confusing.
Solution:   Make the code more straightforward.

src/version.c

@@ -734,6 +734,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    5051,
 /**/
     5050,
 /**/