Fix a bug regarding a mis-identified file type in pdbutil.

llvm-svn: 326929
diff --git a/llvm/tools/llvm-pdbutil/InputFile.cpp b/llvm/tools/llvm-pdbutil/InputFile.cpp
index 8b05381..2874782 100644
--- a/llvm/tools/llvm-pdbutil/InputFile.cpp
+++ b/llvm/tools/llvm-pdbutil/InputFile.cpp
@@ -263,7 +263,7 @@
     return std::move(IF);
   }
 
-  if (Magic == file_magic::unknown) {
+  if (Magic == file_magic::pdb) {
     std::unique_ptr<IPDBSession> Session;
     if (auto Err = loadDataForPDB(PDB_ReaderType::Native, Path, Session))
       return std::move(Err);