patch 8.1.1966: some code in options.c fits better elsewhere
Problem: Some code in options.c fits better elsewhere.
Solution: Move functions from options.c to other files. (Yegappan
Lakshmanan, closes #4889)
diff --git a/src/proto/window.pro b/src/proto/window.pro
index e685b1c..1c4ade8 100644
--- a/src/proto/window.pro
+++ b/src/proto/window.pro
@@ -82,6 +82,7 @@
int win_hasvertsplit(void);
int get_win_number(win_T *wp, win_T *first_win);
int get_tab_number(tabpage_T *tp);
+char *check_colorcolumn(win_T *wp);
int win_getid(typval_T *argvars);
int win_gotoid(typval_T *argvars);
void win_id2tabwin(typval_T *argvars, list_T *list);