Change some StringRef::data() reinterpret_cast to bytes_begin() or arrayRefFromStringRef()

llvm-svn: 357852
diff --git a/llvm/unittests/MC/DwarfLineTables.cpp b/llvm/unittests/MC/DwarfLineTables.cpp
index 95ae72b..af1250d 100644
--- a/llvm/unittests/MC/DwarfLineTables.cpp
+++ b/llvm/unittests/MC/DwarfLineTables.cpp
@@ -57,9 +57,7 @@
   raw_svector_ostream EncodingOS(Buffer);
   MCDwarfLineAddr::Encode(getContext(), Params, LineDelta, AddrDelta,
                           EncodingOS);
-  ArrayRef<uint8_t> Encoding(reinterpret_cast<uint8_t *>(Buffer.data()),
-                             Buffer.size());
-  EXPECT_EQ(ExpectedEncoding, Encoding);
+  EXPECT_EQ(ExpectedEncoding, arrayRefFromStringRef(Buffer));
 }
 
 TEST(DwarfLineTables, TestDefaultParams) {