patch 8.1.0798: changing a blob while iterating over it works strangely

Problem:    Changing a blob while iterating over it works strangely.
Solution:   Make a copy of the Blob before iterating.

src/version.c

@@ -791,6 +791,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    798,
 /**/
     797,
 /**/