Fix crash in RegionStoreManager::Bind() by using 'getAs<PointerType>()' instead of 'cast<PointerType>()' (to handle pointer typedefs).

llvm-svn: 82686
diff --git a/clang/lib/Analysis/RegionStore.cpp b/clang/lib/Analysis/RegionStore.cpp
index 31f52a5..75907da 100644
--- a/clang/lib/Analysis/RegionStore.cpp
+++ b/clang/lib/Analysis/RegionStore.cpp
@@ -1322,7 +1322,7 @@
     // Binding directly to a symbolic region should be treated as binding
     // to element 0.
     QualType T = SR->getSymbol()->getType(getContext());
-    T = cast<PointerType>(T)->getPointeeType();
+    T = T->getAs<PointerType>()->getPointeeType();
     R = GetElementZeroRegion(SR, T);
   }