Convert FindFunctionInStream to return an error_code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194084 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Bitcode/Reader/BitcodeReader.h b/lib/Bitcode/Reader/BitcodeReader.h
index 0a8bb01..b03658b 100644
--- a/lib/Bitcode/Reader/BitcodeReader.h
+++ b/lib/Bitcode/Reader/BitcodeReader.h
@@ -366,7 +366,7 @@
   error_code InitStream();
   error_code InitStreamFromBuffer();
   error_code InitLazyStream();
-  bool FindFunctionInStream(Function *F,
+  error_code FindFunctionInStream(Function *F,
          DenseMap<Function*, uint64_t>::iterator DeferredFunctionInfoIterator);
 };