[pdb] Fix another narrowing conversion on x64 builds.

llvm-svn: 277026

diff --git a/llvm/unittests/DebugInfo/PDB/MappedBlockStreamTest.cpp b/llvm/unittests/DebugInfo/PDB/MappedBlockStreamTest.cpp
index 0ed74a0..2d7814e 100644 (file)
--- a/llvm/unittests/DebugInfo/PDB/MappedBlockStreamTest.cpp
+++ b/llvm/unittests/DebugInfo/PDB/MappedBlockStreamTest.cpp
@@ -63,7 +63,7 @@ public:
   Error commit() const override { return Error::success(); }
 
   MsfStreamLayout layout() const {
-    return MsfStreamLayout{Data.size(), Blocks};
+    return MsfStreamLayout{static_cast<uint32_t>(Data.size()), Blocks};
   }
 
 private: