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/BasicObjCFoundationChecks.cpp b/lib/Checker/BasicObjCFoundationChecks.cpp
index ecb2d1c..1d6104e 100644
--- a/lib/Checker/BasicObjCFoundationChecks.cpp
+++ b/lib/Checker/BasicObjCFoundationChecks.cpp
@@ -358,7 +358,7 @@
   if (!R)
     return false;
 
-  QualType T = Ctx.getCanonicalType(R->getValueType(Ctx));
+  QualType T = Ctx.getCanonicalType(R->getValueType());
 
   // FIXME: If the pointee isn't an integer type, should we flag a warning?
   //  People can do weird stuff with pointers.