[Bug c/18867] [4.0 Regression] ICE on invalid switch quantity

[belyshev at lubercy dot com]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|                            |4.0.0
      Known to work|                            |3.4.4
   Target Milestone|---                         |4.0.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18867