Fix 'warning: comparison is always true due to limited range of data type [-Wtype-limits]' with GCC 7.3
Fix 'warning: comparison is always true due to limited range of data type [-Wtype-limits]' with GCC 7.3

git-svn-id: f6089bf0e6284f307027cef4f64114ee9ebb0424@361840 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/lld,llvm-mirror/lld