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)

src/gui_gtk_x11.c

@@ -2682,7 +2682,7 @@ create_blank_pointer(void)
 #endif
     GdkCursor	*cursor;
 #if GTK_CHECK_VERSION(3,0,0)
-    GdkRGBA	color = { 0.0, 0.0, 0.0, 1.0 };
+    GdkRGBA	color = { 0.0, 0.0, 0.0, 0.0 };
 #else
     GdkColor	color = { 0, 0, 0, 0 };
     char	blank_data[] = { 0x0 };

src/version.c

@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1495,
 /**/
     1494,
 /**/