Fix parsing of class specifiers before '\n' 'operator'.

r159549 / r159164 regressed clang to reject

  struct s {};
  struct s
  operator++(struct s a)
  { return a; }

This fixes the regression. Richard, pleas check if this looks right.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172834 91177308-0d34-0410-b5e6-96231b3b80d8