Get rid of Stmt::Clone now that we can reference count statements instead.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@78452 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaTemplateInstantiateExpr.cpp b/lib/Sema/SemaTemplateInstantiateExpr.cpp
index 1e97f5f..186c98c 100644
--- a/lib/Sema/SemaTemplateInstantiateExpr.cpp
+++ b/lib/Sema/SemaTemplateInstantiateExpr.cpp
@@ -147,7 +147,7 @@
     // arguments left unspecified.
     if (NTTP->getPosition() >= TemplateArgs.size() ||
         TemplateArgs[NTTP->getPosition()].isNull())
-      return SemaRef.Owned(E); // FIXME: Clone the expression!
+      return SemaRef.Owned(E->Retain());
     
     const TemplateArgument &Arg = TemplateArgs[NTTP->getPosition()];