Fix crash in source-line truncation code for diagnostic
printing. Also, when we only need to truncate the line at the end,
make sure there is room for the ellipsis.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@70781 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed