Prefix another use of error_code.

llvm-svn: 210832
diff --git a/clang/lib/CodeGen/CodeGenAction.cpp b/clang/lib/CodeGen/CodeGenAction.cpp
index db3ecc5..407fe94 100644
--- a/clang/lib/CodeGen/CodeGenAction.cpp
+++ b/clang/lib/CodeGen/CodeGenAction.cpp
@@ -621,7 +621,7 @@
 
     ErrorOr<llvm::Module *> ModuleOrErr =
         getLazyBitcodeModule(BCBuf, *VMContext);
-    if (error_code EC = ModuleOrErr.getError()) {
+    if (std::error_code EC = ModuleOrErr.getError()) {
       CI.getDiagnostics().Report(diag::err_cannot_open_file)
         << LinkBCFile << EC.message();
       return nullptr;