updated for version 7.3.171

Problem:    When the clipboard isn't supported: ":yank*" gives a confusing
            error message.
Solution:   Specifically mention that the register name is invalid.
            (Jean-Rene David)

src/version.c

@@ -714,6 +714,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    171,
 /**/
     170,
 /**/