Fix assertion failure in PTH when tokens followed a closing #endif.
 - Ted, please check.

 - Missing test case because PTH won't reliably cache the tokens in a
   test case. *cough*


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68966 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed