patch 9.0.1743: Parameter of gui_gtk:gui_mch_browse incorrectly marked as UNUSED

Problem:    Parameter of gui_gtk:gui_mch_browse incorrectly marked as
            UNUSED.
Solution:   Remove UNUSED flag.

closes: #12841

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Doug Kearns <dougkearns@gmail.com>
diff --git a/src/version.c b/src/version.c
index a30793d..1ee8dd3 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1743,
+/**/
     1742,
 /**/
     1741,