patch 7.4.1816

Problem:    Looping over a null list throws an error.
Solution:   Skip over the for loop.

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1816,
 /**/
     1815,
 /**/