patch 8.2.1080: Vim9: no line break allowed in a for loop

Problem:    Vim9: no line break allowed in a for loop.
Solution:   Skip line breaks in for command.
diff --git a/src/proto/eval.pro b/src/proto/eval.pro
index 88dd8a7..0e9ffeb 100644
--- a/src/proto/eval.pro
+++ b/src/proto/eval.pro
@@ -22,7 +22,8 @@
 char_u *get_lval(char_u *name, typval_T *rettv, lval_T *lp, int unlet, int skip, int flags, int fne_flags);
 void clear_lval(lval_T *lp);
 void set_var_lval(lval_T *lp, char_u *endp, typval_T *rettv, int copy, int flags, char_u *op);
-void *eval_for_line(char_u *arg, int *errp, exarg_T *eap, int skip);
+void *eval_for_line(char_u *arg, int *errp, exarg_T *eap, evalarg_T *evalarg);
+void skip_for_lines(void *fi_void, evalarg_T *evalarg);
 int next_for_item(void *fi_void, char_u *arg);
 void free_for_info(void *fi_void);
 void set_context_for_expression(expand_T *xp, char_u *arg, cmdidx_T cmdidx);