Simplify code a bit by passing StreamFile to the BitstreamCursor constructor.

llvm-svn: 221784
diff --git a/clang/lib/Serialization/GlobalModuleIndex.cpp b/clang/lib/Serialization/GlobalModuleIndex.cpp
index a67f9f3..4791388 100644
--- a/clang/lib/Serialization/GlobalModuleIndex.cpp
+++ b/clang/lib/Serialization/GlobalModuleIndex.cpp
@@ -501,10 +501,9 @@
 
   // Initialize the input stream
   llvm::BitstreamReader InStreamFile;
-  llvm::BitstreamCursor InStream;
   InStreamFile.init((const unsigned char *)(*Buffer)->getBufferStart(),
                     (const unsigned char *)(*Buffer)->getBufferEnd());
-  InStream.init(InStreamFile);
+  llvm::BitstreamCursor InStream(InStreamFile);
 
   // Sniff for the signature.
   if (InStream.Read(8) != 'C' ||