Replace a bunch of static_cast + release with takeAs.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@70566 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaTemplateInstantiate.cpp b/lib/Sema/SemaTemplateInstantiate.cpp
index bd385d3..1378682 100644
--- a/lib/Sema/SemaTemplateInstantiate.cpp
+++ b/lib/Sema/SemaTemplateInstantiate.cpp
@@ -465,7 +465,7 @@
                                   NumTemplateArgs);
       if (E.isInvalid())
         return QualType();
-      InstantiatedTemplateArgs.push_back((Expr *)E.release());
+      InstantiatedTemplateArgs.push_back(E.takeAs<Expr>());
       break;
     }
   }