Sema - silence static analyzer getAs<> null dereference warnings. NFCI.

The static analyzer is warning about potential null dereferences, but in these cases we should be able to use castAs<> directly and if not assert will fire for us.

llvm-svn: 373911
diff --git a/clang/lib/Sema/SemaAccess.cpp b/clang/lib/Sema/SemaAccess.cpp
index b20f279..9dbb933 100644
--- a/clang/lib/Sema/SemaAccess.cpp
+++ b/clang/lib/Sema/SemaAccess.cpp
@@ -1551,7 +1551,7 @@
 
   QualType BaseType = E->getBaseType();
   if (E->isArrow())
-    BaseType = BaseType->getAs<PointerType>()->getPointeeType();
+    BaseType = BaseType->castAs<PointerType>()->getPointeeType();
 
   AccessTarget Entity(Context, AccessTarget::Member, E->getNamingClass(),
                       Found, BaseType);