patch 8.2.1329: Vim9: cannot define global function inside :def function

Problem:    Vim9: cannot define global function inside :def function.
Solution:   Assign to global variable instead of local. (closes #6584)
diff --git a/src/proto/misc2.pro b/src/proto/misc2.pro
index e1e20aa..d55fc31 100644
--- a/src/proto/misc2.pro
+++ b/src/proto/misc2.pro
@@ -56,6 +56,7 @@
 int vim_isspace(int x);
 void ga_clear(garray_T *gap);
 void ga_clear_strings(garray_T *gap);
+int ga_copy_strings(garray_T *from, garray_T *to);
 void ga_init(garray_T *gap);
 void ga_init2(garray_T *gap, int itemsize, int growsize);
 int ga_grow(garray_T *gap, int n);
diff --git a/src/proto/userfunc.pro b/src/proto/userfunc.pro
index 9c9eb2d..f30ac2f 100644
--- a/src/proto/userfunc.pro
+++ b/src/proto/userfunc.pro
@@ -5,6 +5,7 @@
 char_u *get_lambda_name(void);
 char_u *register_cfunc(cfunc_T cb, cfunc_free_T cb_free, void *state);
 int get_lambda_tv(char_u **arg, typval_T *rettv, evalarg_T *evalarg);
+void copy_func(char_u *lambda, char_u *global);
 char_u *deref_func_name(char_u *name, int *lenp, partial_T **partialp, int no_autoload);
 void emsg_funcname(char *ermsg, char_u *name);
 int get_func_tv(char_u *name, int len, typval_T *rettv, char_u **arg, evalarg_T *evalarg, funcexe_T *funcexe);