patch 7.4.698

Problem:    Various problems with locked and fixed lists and dictionaries.
Solution:   Disallow changing locked items, fix a crash, add tests. (Olaf
            Dabrunz)

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    698,
 /**/
     697,
 /**/