Ken Thomases : winemac: Handle failure to get clipboard format name; don' t use uninitialized buffer.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: cba4bcb47fee29f993d9b722e1d133a85a019add
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=cba4bcb47fee29f993d9b722e1d133a85a019add

Author: Ken Thomases <ken at codeweavers.com>
Date:   Mon Apr  8 15:43:13 2013 -0500

winemac: Handle failure to get clipboard format name; don't use uninitialized buffer.

---

 dlls/winemac.drv/clipboard.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/dlls/winemac.drv/clipboard.c b/dlls/winemac.drv/clipboard.c
index 6dfb2a2..53b1448 100644
--- a/dlls/winemac.drv/clipboard.c
+++ b/dlls/winemac.drv/clipboard.c
@@ -292,7 +292,13 @@ static WINE_CLIPFORMAT *insert_clipboard_format(UINT id, CFStringRef type)
     {
         WCHAR buffer[256];
 
-        GetClipboardFormatNameW(format->format_id, buffer, 256);
+        if (!GetClipboardFormatNameW(format->format_id, buffer, sizeof(buffer) / sizeof(buffer[0])))
+        {
+            WARN("failed to get name for format %s; error 0x%08x\n", debugstr_format(format->format_id), GetLastError());
+            HeapFree(GetProcessHeap(), 0, format);
+            return NULL;
+        }
+
         if (!strncmpW(buffer, mac_type_name_prefix, strlenW(mac_type_name_prefix)))
         {
             const WCHAR *p = buffer + strlenW(mac_type_name_prefix);