[Xcb] [PATCH:xcb-util v2] xcb_event.h: fix typos in comments

[Barton C Massey]

In message <1276465128-26465-1-git-send-email-alan.coopersmith at oracle.com> you wrote:
> Does not change "success" typo in XCB_EVENT_ERROR_SUCESS since that
> would be an API break.

Please 
  #define XCB_EVENT_ERROR_SUCESS 0
  #define XCB_EVENT_ERROR_SUCCESS 0
thus not breaking the API while also allowing things to be
spelled correctly.

Ouch.  Thanks for the catch.

    Bart