ConvertUTF.h: Suppress a warning with ptrdiff_t on i686. [-Wsign-compare]

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173436 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/clang/Basic/ConvertUTF.h b/include/clang/Basic/ConvertUTF.h
index 2d13d2c2b969deeafb49bc16785c30285ad487da..7e04a12a4b8a2c64d08275bb423f9f42d79e994d 100644 (file)
--- a/include/clang/Basic/ConvertUTF.h
+++ b/include/clang/Basic/ConvertUTF.h
@@ -217,7 +217,7 @@ static inline ConversionResult convertUTF8Sequence(const UTF8 **source,
   if (*source == sourceEnd)
     return sourceExhausted;
   unsigned size = getNumBytesForUTF8(**source);
-  if (size > sourceEnd - *source)
+  if ((ptrdiff_t)size > sourceEnd - *source)
     return sourceExhausted;
   return ConvertUTF8toUTF32(source, *source + size, &target, target + 1, flags);
 }