patch 9.0.1495: GTK3: hiding the mouse pointer does not work

Problem:    GTK3: hiding the mouse pointer does not work. (Rory O’Kane)
Solution:   Set alpha level to zero. (Kenny Stauffer, closes #12293,
            closes #3256)
diff --git a/src/version.c b/src/version.c
index 929308c..96e2611 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1495,
+/**/
     1494,
 /**/
     1493,