patch 8.2.2685: custom statusline not drawn correctly with WinBar

Problem:    Custom statusline not drawn correctly with WinBar.
Solution:   Also adjust the column for the custom status line. (Yee Cheng
            Chin, closes #8047)
diff --git a/src/drawscreen.c b/src/drawscreen.c
index 051d94b..0e36e79 100644
--- a/src/drawscreen.c
+++ b/src/drawscreen.c
@@ -380,7 +380,7 @@
 /*
  * Return the row for drawing the statusline and the ruler of window "wp".
  */
-    static int
+    int
 statusline_row(win_T *wp)
 {
 #if defined(FEAT_PROP_POPUP)