patch 9.1.1414: MS-Windows: compile warnings in os_win32.c

Problem:  MS-Windows: compile warnings in os_win32.c
Solution: update function declarations, correctly access param arg in
          set_flag() using (sig_atomic_t) cast (John Marriott)

closes: #17368

Co-authored-by: Hirohito Higashi <h.east.727@gmail.com>
Signed-off-by: John Marriott <basilisk@internode.on.net>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index adb5654..5366f3f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -710,6 +710,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1414,
+/**/
     1413,
 /**/
     1412,