updated for version 7.3.508

Problem:    Default for v:register is not set.
Solution:   Init v:register in eval_init(). Correct for 'clipboard' before the
            main loop. (Ingo Karkat)

src/version.c

@@ -714,6 +714,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    508,
 /**/
     507,
 /**/