patch 9.0.2175: Compile error with Motif UI + mouse support

Problem:  Compile error with Motif UI + mouse support (after v9.0.1262)
Solution: Use correct oldval option pointer

Fix compilation error introduced by 9.0.1262 and found in #13704.

closes: #13726

Signed-off-by: Ken Takata <kentkt@csc.jp>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index 78fb3e0..e65c231 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2176,
+/**/
     2175,
 /**/
     2174,