xfree86: Remove devices that failed to enable on startup

Devices that succeeded during PreInit and DEVICE_INIT but failed in
DEVICE_ON would be deleted through xf86DeleteInput but not removed from the
list of input devices (and not turned off). The result was a double free on
server shutdown.

Fix this by calling RemoveDevice if EnableDevice fails.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Daniel Stone <daniel@fooishbar.org>

hw/xfree86/common/xf86Xinput.c

@@ -844,6 +844,7 @@ xf86NewInputDevice(InputInfoPtr pInfo, DeviceIntPtr *pdev, BOOL enable)
         {
             OsReleaseSignals();
             xf86Msg(X_ERROR, "Couldn't init device \"%s\"\n", pInfo->name);
+            RemoveDevice(dev, TRUE);
             rval = BadMatch;
             goto unwind;
         }