[libclang] Fix a crash when serializing a preprocessing record that contains
an #include entry that did not resolve to header file.

Part of rdar://11007039

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@152275 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Index/pch-with-errors.c b/test/Index/pch-with-errors.c
index 21cf32a..d352000 100644
--- a/test/Index/pch-with-errors.c
+++ b/test/Index/pch-with-errors.c
@@ -1,7 +1,7 @@
-
 #ifndef HEADER
 #define HEADER
 
+#include "blahblah.h"
 void erroneous(int);
 void erroneous(float);
 
@@ -13,9 +13,9 @@
 
 #endif
 
-// RUN: c-index-test -write-pch %t.h.pch %s
-// RUN: c-index-test -test-load-source local %s -include %t.h | FileCheck -check-prefix=CHECK-PARSE %s
-// RUN: c-index-test -index-file %s -include %t.h | FileCheck -check-prefix=CHECK-INDEX %s
+// RUN: c-index-test -write-pch %t.h.pch %s -Xclang -detailed-preprocessing-record
+// RUN: c-index-test -test-load-source local %s -include %t.h -Xclang -detailed-preprocessing-record | FileCheck -check-prefix=CHECK-PARSE %s
+// RUN: c-index-test -index-file %s -include %t.h -Xclang -detailed-preprocessing-record | FileCheck -check-prefix=CHECK-INDEX %s
 
 // CHECK-PARSE: pch-with-errors.c:10:6: FunctionDecl=foo:10:6 (Definition) Extent=[10:1 - 12:2]
 // CHECK-PARSE: pch-with-errors.c:11:3: CallExpr=erroneous:5:6 Extent=[11:3 - 11:15]