Add SourceLocations to ObjCClassDecl for the class identifiers referenced by @class.

llvm-svn: 89170
diff --git a/clang/lib/Frontend/RewriteObjC.cpp b/clang/lib/Frontend/RewriteObjC.cpp
index 24ad69e..06955e5 100644
--- a/clang/lib/Frontend/RewriteObjC.cpp
+++ b/clang/lib/Frontend/RewriteObjC.cpp
@@ -744,7 +744,7 @@
   typedefString += "\n";
   for (ObjCClassDecl::iterator I = ClassDecl->begin(), E = ClassDecl->end();
        I != E; ++I) {
-    ObjCInterfaceDecl *ForwardDecl = *I;
+    ObjCInterfaceDecl *ForwardDecl = I->getInterface();
     typedefString += "#ifndef _REWRITER_typedef_";
     typedefString += ForwardDecl->getNameAsString();
     typedefString += "\n";