Use isa<...> instead of dyn_cast<...> where result is not needed.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64680 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/ASTContext.cpp b/lib/AST/ASTContext.cpp
index d7f686f..d2de4c3 100644
--- a/lib/AST/ASTContext.cpp
+++ b/lib/AST/ASTContext.cpp
@@ -2086,7 +2086,7 @@
     }
     else if (PointeeTy->isObjCInterfaceType()) {
       if (!EncodingProperty &&
-          dyn_cast<TypedefType>(PointeeTy.getTypePtr())) {
+          isa<TypedefType>(PointeeTy.getTypePtr())) {
         // Another historical/compatibility reason.
         // We encode the underlying type which comes out as 
         // {...};