patch 9.0.2177: Wrong cursor position when dragging out of window

Problem:  Wrong cursor position when dragging out of window.
Solution: Don't use ScreenCols[] when mouse is not in current window.

closes: #13717

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index e65c231..b8dfc98 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2177,
+/**/
     2176,
 /**/
     2175,