updated for version 7.3.981

Problem:    In the old regexp engine \i, \I, \f and \F don't work on
            multi-byte characters.
Solution:   Dereference pointer properly.

src/version.c

@@ -728,6 +728,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    981,
 /**/
     980,
 /**/