fix test/PCH/method_pool.m


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@70263 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/PCHReader.cpp b/lib/Frontend/PCHReader.cpp
index 7ca0300..24e4e2b 100644
--- a/lib/Frontend/PCHReader.cpp
+++ b/lib/Frontend/PCHReader.cpp
@@ -270,7 +270,7 @@
     // Read all of the declarations visible at global scope with this
     // name.
     Sema *SemaObj = Reader.getSema();
-    if (!SemaObj) return II;
+    if (Reader.getContext() == 0) return II;
     
     while (DataLen > 0) {
       NamedDecl *D = cast<NamedDecl>(Reader.GetDecl(ReadUnalignedLE32(d)));