[Spice-devel] [PATCH spicec windows 1/1] client/windows: fix SetClipboardViewer error handling rhbz#786554

[Arnon Gilboa]

MSDN says the following about SetClipboardViewer(): "If an error occurs or there
are no other windows in the clipboard viewer chain, the return value is NULL".
Seems like the buggy case was "no other windows in the clipboard viewer chain",
which explains the 3rd party clipboard manager workaround detailed in the bug
description.
---
 client/windows/platform.cpp |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/client/windows/platform.cpp b/client/windows/platform.cpp
index 0f35a65..223be1d 100644
--- a/client/windows/platform.cpp
+++ b/client/windows/platform.cpp
@@ -236,6 +236,7 @@ static void create_message_wind()
 {
     WNDCLASSEX wclass;
     ATOM class_atom;
+    DWORD err;
 
     const LPCWSTR class_name = L"spicec_platform_wclass";
 
@@ -259,9 +260,9 @@ static void create_message_wind()
     if (!(platform_win = CreateWindow(class_name, L"", 0, 0, 0, 0, 0, NULL, NULL, instance, NULL))) {
         THROW("create message window failed");
     }
-
-    if (!(next_clipboard_viewer_win = SetClipboardViewer(platform_win)) && GetLastError()) {
-        THROW("set clipboard viewer failed");
+    SetLastError(0);
+    if (!(next_clipboard_viewer_win = SetClipboardViewer(platform_win)) && (err = GetLastError())) {
+        THROW("set clipboard viewer failed %u", err);
     }
     if (!(clipboard_event = CreateEvent(NULL, FALSE, FALSE, NULL))) {
         THROW("create clipboard event failed");
-- 
1.7.4.1