patch 8.1.2021: some global functions can be local to the file
Problem: Some global functions can be local to the file.
Solution: Add "static". (Yegappan Lakshmanan, closes #4917)
diff --git a/src/undo.c b/src/undo.c
index 8145af0..732efab 100644
--- a/src/undo.c
+++ b/src/undo.c
@@ -775,7 +775,7 @@
* When "reading" is FALSE use the first name where the directory exists.
* Returns NULL when there is no place to write or no file to read.
*/
- char_u *
+ static char_u *
u_get_undo_file_name(char_u *buf_ffname, int reading)
{
char_u *dirp;
@@ -3590,7 +3590,7 @@
* For undotree(): Append the list of undo blocks at "first_uhp" to "list".
* Recursive.
*/
- void
+ static void
u_eval_tree(u_header_T *first_uhp, list_T *list)
{
u_header_T *uhp = first_uhp;