Remove a dead argument to ProcessUCNEscape.

Fix string concatenation to treat escapes in concatenated strings that
are wide because of other string chunks to process the escapes as wide
themselves.  Before we would warn about and miscompile the attached testcase.

This fixes rdar://8040728 - miscompile + warning: hex escape sequence out of range


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@106012 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed