xf86-input-evdev: Return proper default for unknown values in pInfo->device_control.

Signed-off-by: Terry Lambert <tlambert@chromium.org>
Reviewed-by: Stephane Marchesin <marcheu@chromium.org>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

src/evdev.c

@@ -1442,6 +1442,9 @@ EvdevProc(DeviceIntPtr device, int what)
         EvdevRemoveDevice(pInfo);
         pEvdev->min_maj = 0;
 	break;
+
+    default:
+        return BadValue;
     }
 
     return Success;