patch 7.4.2090
Problem: Using submatch() in a lambda passed to substitute() is verbose.
Solution: Use a static list and pass it as an optional argument to the
function. Fix memory leak.
diff --git a/src/proto/userfunc.pro b/src/proto/userfunc.pro
index b354197..feacd4c 100644
--- a/src/proto/userfunc.pro
+++ b/src/proto/userfunc.pro
@@ -5,7 +5,7 @@
int get_func_tv(char_u *name, int len, typval_T *rettv, char_u **arg, linenr_T firstline, linenr_T lastline, int *doesrange, int evaluate, partial_T *partial, dict_T *selfdict);
void free_all_functions(void);
int func_call(char_u *name, typval_T *args, partial_T *partial, dict_T *selfdict, typval_T *rettv);
-int call_func(char_u *funcname, int len, typval_T *rettv, int argcount_in, typval_T *argvars_in, linenr_T firstline, linenr_T lastline, int *doesrange, int evaluate, partial_T *partial, dict_T *selfdict_in);
+int call_func(char_u *funcname, int len, typval_T *rettv, int argcount_in, typval_T *argvars_in, int (*argv_func)(int, typval_T *, int), linenr_T firstline, linenr_T lastline, int *doesrange, int evaluate, partial_T *partial, dict_T *selfdict_in);
void ex_function(exarg_T *eap);
int eval_fname_script(char_u *p);
int translated_function_exists(char_u *name);