patch 8.0.1135: W_WINCOL() is always the same

Problem:    W_WINCOL() is always the same.
Solution:   Expand the macro.
diff --git a/src/term.c b/src/term.c
index 25aaa91..5714c89 100644
--- a/src/term.c
+++ b/src/term.c
@@ -3816,8 +3816,8 @@
     OUT_STR(tgoto((char *)T_CS, W_WINROW(wp) + wp->w_height - 1,
 							 W_WINROW(wp) + off));
     if (*T_CSV != NUL && wp->w_width != Columns)
-	OUT_STR(tgoto((char *)T_CSV, W_WINCOL(wp) + wp->w_width - 1,
-							       W_WINCOL(wp)));
+	OUT_STR(tgoto((char *)T_CSV, wp->w_wincol + wp->w_width - 1,
+							       wp->w_wincol));
     screen_start();		    /* don't know where cursor is now */
 }