Fix pointer-signext.c test case: it was relying on value names, which don't appear in the non-assert build.  Switch to using check-next as well.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@113964 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed