From 54b6db17639bbc4935b0ae6850303770c232ba58 Mon Sep 17 00:00:00 2001
From: Steve Naroff <snaroff@apple.com>
Date: Fri, 24 Apr 2009 16:08:42 +0000
Subject: [PATCH] Allow the next catoregory slot to be null.

llvm-svn: 69969
---
 clang/lib/Frontend/PCHReader.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/clang/lib/Frontend/PCHReader.cpp b/clang/lib/Frontend/PCHReader.cpp
index 06a7258cda61..d50ab8310b07 100644
--- a/clang/lib/Frontend/PCHReader.cpp
+++ b/clang/lib/Frontend/PCHReader.cpp
@@ -298,7 +298,9 @@ void PCHDeclReader::VisitObjCCategoryDecl(ObjCCategoryDecl *CD) {
   for (unsigned I = 0; I != NumProtoRefs; ++I)
     ProtoRefs.push_back(cast<ObjCProtocolDecl>(Reader.GetDecl(Record[Idx++])));
   CD->setProtocolList(&ProtoRefs[0], NumProtoRefs, Reader.getContext());
-  CD->setNextClassCategory(cast<ObjCCategoryDecl>(Reader.GetDecl(Record[Idx++])));
+  unsigned nextCat = Record[Idx++];
+  CD->setNextClassCategory(nextCat ? 
+                           cast<ObjCCategoryDecl>(Reader.GetDecl(nextCat)) : 0);
   CD->setLocEnd(SourceLocation::getFromRawEncoding(Record[Idx++]));
 }