patch 8.0.1582: in the MS-Windows console mouse movement is not used

Problem:    In the MS-Windows console mouse movement is not used.
Solution:   Pass mouse movement events when useful.
diff --git a/src/proto/os_win32.pro b/src/proto/os_win32.pro
index d76e270..1bed98a 100644
--- a/src/proto/os_win32.pro
+++ b/src/proto/os_win32.pro
@@ -6,6 +6,7 @@
 void dyn_libintl_end(void);
 void PlatformId(void);
 void mch_setmouse(int on);
+void mch_bevalterm_changed(void);
 void mch_update_cursor(void);
 int mch_char_avail(void);
 int mch_check_messages(void);