YAMLParser: silence warning about tautological comparison on unsigned-char platforms.

No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155280 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Support/YAMLParser.cpp b/lib/Support/YAMLParser.cpp
index 330519f3019d31897ec8e12ed971a199c8e3a827..9b5896de7aa1843d2fb8a44e323e399560cacc98 100644 (file)
--- a/lib/Support/YAMLParser.cpp
+++ b/lib/Support/YAMLParser.cpp
@@ -658,7 +658,7 @@ std::string yaml::escape(StringRef Input) {
       EscapedInput += "\\r";
     else if (*i == 0x1B)
       EscapedInput += "\\e";
-    else if (*i >= 0 && *i < 0x20) { // Control characters not handled above.
+    else if ((unsigned char)*i < 0x20) { // Control characters not handled above.
       std::string HexStr = utohexstr(*i);
       EscapedInput += "\\x" + std::string(2 - HexStr.size(), '0') + HexStr;
     } else if (*i & 0x80) { // UTF-8 multiple code unit subsequence.