Fix some test failures involving -ast-print.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@72605 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/StmtPrinter.cpp b/lib/AST/StmtPrinter.cpp
index a427147..113cbb4 100644
--- a/lib/AST/StmtPrinter.cpp
+++ b/lib/AST/StmtPrinter.cpp
@@ -255,6 +255,11 @@
   if (TD)
     ++Begin;
 
+  if (Begin == End) {
+    PrintRawDecl(TD);
+    return;
+  }
+
   if (isa<TypedefDecl>(*Begin))
     OS << "typedef ";
   else if (VarDecl *V = dyn_cast<VarDecl>(*Begin)) {