Description of problem:
reset_touch_buttons() submits bad property values. It uses the XI 1.x device property calls which are modelled after the standard Xlib calls. For 32-bit values the data must be a long, not an int, otherwise Xlib reads garbage and sends that over to the server.

Version-Release number of selected component (if applicable):
gnome-settings-daemon-2.28.2-30.el6.x86_64

How reproducible:
sudo /usr/libexec/gsd-test-wacom on a 6.6 box with the rebased xorg-x11-drv-wacom fails. Alternatively, run it and then check the property values on the Wacom pad device with xinput list-props. The values are not the same that were submitted (second value is garbage).

Additional info:
There is an push/pop error handler around the calls to reset_touch_buttons. However, gdk3 documentation claims that  gdk_error_trap_pop() didn't call gdk_flush() in gdk2, so we're not getting the error at the right time. gsd-test-wacom --sync triggers the error handler and thus doesn't crash.

Fix below:

diff --git a/plugins/wacom/gsd-wacom-manager.c b/plugins/wacom/gsd-wacom-manager.c
index 2c9b49f..915a095 100644
--- a/plugins/wacom/gsd-wacom-manager.c
+++ b/plugins/wacom/gsd-wacom-manager.c
@@ -532,7 +532,7 @@ reset_touch_buttons (XDevice               *xdev,
 	for (i = 0; buttons[i].button != NULL; i++)
 	{
 		char *propname;
-		int action[2]; /* press + release */
+		long action[2]; /* press + release */
 		Atom prop;
 		int mapped_button = buttons[i].num;