MemRegion can refer to ASTContext without external help.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@110784 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Checker/GRState.cpp b/lib/Checker/GRState.cpp
index 82563ed..bb76328 100644
--- a/lib/Checker/GRState.cpp
+++ b/lib/Checker/GRState.cpp
@@ -88,7 +88,7 @@
     return UnknownVal();
 
   if (const TypedRegion *TR = dyn_cast<TypedRegion>(R)) {
-    QualType T = TR->getValueType(getStateManager().getContext());
+    QualType T = TR->getValueType();
     if (Loc::IsLocType(T) || T->isIntegerType())
       return getSVal(R);
   }