refactor: add function xstrnsave

xstrnsave is a clone of vim_strnsave that uses char* instead of char_u*.
Its purpose short-term is to help reduce the number of casts and for
long-term to replace vim_strnsave as the need to use char_u is
eliminated.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/nvim/ex_eval.c b/src/nvim/ex_eval.c
index f4aaab5c43..a32f7db5f2 100644
--- a/src/nvim/ex_eval.c
+++ b/src/nvim/ex_eval.c
@@ -388,12 +388,12 @@ char *get_exception_string(void *value, except_type_T type, char_u *cmdname, int
     mesg = ((struct msglist *)value)->throw_msg;
     if (cmdname != NULL && *cmdname != NUL) {
       size_t cmdlen = STRLEN(cmdname);
-      ret = (char *)vim_strnsave((char_u *)"Vim(", 4 + cmdlen + 2 + STRLEN(mesg));
+      ret = xstrnsave("Vim(", 4 + cmdlen + 2 + STRLEN(mesg));
       STRCPY(&ret[4], cmdname);
       STRCPY(&ret[4 + cmdlen], "):");
       val = ret + 4 + cmdlen + 2;
     } else {
-      ret = (char *)vim_strnsave((char_u *)"Vim:", 4 + STRLEN(mesg));
+      ret = xstrnsave("Vim:", 4 + STRLEN(mesg));
       val = ret + 4;
     }