patch 9.0.0225: using freed memory with multiple line breaks in expression

Problem:    Using freed memory with multiple line breaks in expression.
Solution:   Free eval_tofree later.
diff --git a/src/proto/eval.pro b/src/proto/eval.pro
index e6cd892..27a13c9 100644
--- a/src/proto/eval.pro
+++ b/src/proto/eval.pro
@@ -9,6 +9,8 @@
 int eval_expr_typval(typval_T *expr, typval_T *argv, int argc, typval_T *rettv);
 int eval_expr_to_bool(typval_T *expr, int *error);
 char_u *eval_to_string_skip(char_u *arg, exarg_T *eap, int skip);
+void init_evalarg(evalarg_T *evalarg);
+void clear_evalarg(evalarg_T *evalarg, exarg_T *eap);
 int skip_expr(char_u **pp, evalarg_T *evalarg);
 int skip_expr_concatenate(char_u **arg, char_u **start, char_u **end, evalarg_T *evalarg);
 char_u *typval2string(typval_T *tv, int convert);
@@ -34,8 +36,6 @@
 char_u *eval_next_non_blank(char_u *arg, evalarg_T *evalarg, int *getnext);
 char_u *eval_next_line(char_u *arg, evalarg_T *evalarg);
 char_u *skipwhite_and_linebreak(char_u *arg, evalarg_T *evalarg);
-void init_evalarg(evalarg_T *evalarg);
-void clear_evalarg(evalarg_T *evalarg, exarg_T *eap);
 int eval0(char_u *arg, typval_T *rettv, exarg_T *eap, evalarg_T *evalarg);
 int eval0_retarg(char_u *arg, typval_T *rettv, exarg_T *eap, evalarg_T *evalarg, char_u **retarg);
 int eval1(char_u **arg, typval_T *rettv, evalarg_T *evalarg);