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/eval.c

@@ -880,6 +880,7 @@ eval_init()
 	    hash_add(&compat_hashtab, p->vv_di.di_key);
     }
     set_vim_var_nr(VV_SEARCHFORWARD, 1L);
+    set_reg_var(0);  /* default for v:register is not 0 but '"' */
 
 #ifdef EBCDIC
     /*