Silence -Asserts warning.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@89373 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/Store.cpp b/lib/Analysis/Store.cpp
index 2fd72ac..bbf0c46 100644
--- a/lib/Analysis/Store.cpp
+++ b/lib/Analysis/Store.cpp
@@ -195,6 +195,7 @@
 SVal  StoreManager::CastRetrievedVal(SVal V, const TypedRegion *R,
                                      QualType castTy) {
   ASTContext &Ctx = ValMgr.getContext();
+  (void) Ctx;
 
   if (castTy.isNull())
     return V;