Implement C++0x nullptr.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@71405 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/PCHReader.cpp b/lib/Frontend/PCHReader.cpp
index 9323620..759865c 100644
--- a/lib/Frontend/PCHReader.cpp
+++ b/lib/Frontend/PCHReader.cpp
@@ -1676,6 +1676,7 @@
     case pch::PREDEF_TYPE_LONGDOUBLE_ID: T = Context->LongDoubleTy;       break;
     case pch::PREDEF_TYPE_OVERLOAD_ID:   T = Context->OverloadTy;         break;
     case pch::PREDEF_TYPE_DEPENDENT_ID:  T = Context->DependentTy;        break;
+    case pch::PREDEF_TYPE_NULLPTR_ID:    T = Context->NullPtrTy;          break;
     }
 
     assert(!T.isNull() && "Unknown predefined type");