event: Properly ignore the "send event" flag

Thanks to muni who managed to crash his WM with conky. When conky runs in its
own window, clicking on it will sometimes (depending on the conkyrc) use
XSendEvent() to forward the event to the WM.

Signed-off-by: Uli Schlachter <psychon@znc.in>

event.c

@@ -135,7 +135,7 @@ static void
 event_emit_button(xcb_button_press_event_t *ev)
 {
     const char *name;
-    switch(ev->response_type)
+    switch(XCB_EVENT_RESPONSE_TYPE(ev))
     {
     case XCB_BUTTON_PRESS:
         name = "button::press";
@@ -172,7 +172,7 @@ event_update_button_state(uint8_t response_type, uint8_t button)
         return;
     }
 
-    switch(response_type)
+    switch(response_type & XCB_EVENT_RESPONSE_TYPE_MASK)
     {
     case XCB_BUTTON_PRESS:
         /* Set the (button-1)-st bit */