spelling typo

[Mike Stump]

Here is a simple one:

Doing diffs in .:
*** ./gcc/tree.def.~1~	Mon Aug 11 08:57:14 1997
--- ./gcc/tree.def	Wed Sep  3 13:47:43 1997
*************** DEFTREECODE (METHOD_CALL_EXPR, "method_c
*** 461,467 ****
     call expand_start_target_temps/expand_end_target_temps, as needed.
  
     This differs from TRY_CATCH_EXPR in that operand 2 is always
!    evaluated when an exception isn't throw when cleanups are run.  */
  DEFTREECODE (WITH_CLEANUP_EXPR, "with_cleanup_expr", "e", 3)
  
  /* Specify a cleanup point.
--- 461,467 ----
     call expand_start_target_temps/expand_end_target_temps, as needed.
  
     This differs from TRY_CATCH_EXPR in that operand 2 is always
!    evaluated when an exception isn't thrown when cleanups are run.  */
  DEFTREECODE (WITH_CLEANUP_EXPR, "with_cleanup_expr", "e", 3)
  
  /* Specify a cleanup point.
--------------