convert more code to use ASTContext to get canonical types instead
of doing it directly.  This is required for PR2189.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@54102 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaStmt.cpp b/lib/Sema/SemaStmt.cpp
index a4e8946..e743810 100644
--- a/lib/Sema/SemaStmt.cpp
+++ b/lib/Sema/SemaStmt.cpp
@@ -712,7 +712,7 @@
     
     // Check that the output exprs are valid lvalues.
     Expr *OutputExpr = (Expr *)Exprs[i];
-    Expr::isLvalueResult Result = OutputExpr->isLvalue();
+    Expr::isLvalueResult Result = OutputExpr->isLvalue(Context);
     if (Result != Expr::LV_Valid) {
       ParenExpr *PE = cast<ParenExpr>(OutputExpr);