patch 9.0.1970: win32: high-dpi support can be improved

Problem:  win32: high-dpi support can be improved
Solution: implement WM_GETDPISCALEDSIZE

win32: Better support of Per-Monitor V2 High DPI

Implement WM_GETDPISCALEDSIZE.
It is not so easy to calculate the new size without actually changing
the size. So, this returns an approximate size.

This doesn't work well when a bitmap font (e.g. FixedSys) is selected,
but I think this is acceptable.

closes: #11812
closes: #13252

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Ken Takata <kentkt@csc.jp>
diff --git a/src/version.c b/src/version.c
index 3056f35..de1fe3f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1970,
+/**/
     1969,
 /**/
     1968,