[libclang] Fix leak in clang_indexSourceFile_Impl

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@145393 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/libclang/Indexing.cpp b/tools/libclang/Indexing.cpp
index 222e301..5950455 100644
--- a/tools/libclang/Indexing.cpp
+++ b/tools/libclang/Indexing.cpp
@@ -252,7 +252,8 @@
     Diags(CompilerInstance::createDiagnostics(DiagOpts, num_command_line_args, 
                                                 command_line_args,
                                                 CaptureDiag,
-                                                /*ShouldOwnClient=*/true));
+                                                /*ShouldOwnClient=*/true,
+                                                /*ShouldCloneClient=*/false));
 
   // Recover resources if we crash before exiting this function.
   llvm::CrashRecoveryContextCleanupRegistrar<DiagnosticsEngine,