Return true on errors, return true on errors, return true on errors

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64957 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaDecl.cpp b/lib/Sema/SemaDecl.cpp
index a276f3c..9cd5bc8 100644
--- a/lib/Sema/SemaDecl.cpp
+++ b/lib/Sema/SemaDecl.cpp
@@ -660,7 +660,7 @@
       Diag(New->getLocation(), diag::warn_redecl_library_builtin) << New;
       Diag(Old->getLocation(), diag::note_previous_builtin_declaration)
         << Old << Old->getType();
-      return false;
+      return true;
     }
 
     PrevDiag = diag::note_previous_builtin_declaration;