user: GetClipboardFormatNameA fix.

In the W->A translation make sure we have characters to translate before doing the WideCharToMultiByte with -1.

user: GetClipboardFormatNameA fix.
c50fbab4 · Aric Stewart · Alexandre Julliard · 2302d2b4 · c50fbab4
Commit c50fbab4 authored Dec 14, 2005 by Aric Stewart Committed by Alexandre Julliard Dec 14, 2005
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clipboard.c dlls/user/clipboard.c +1 -1

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--- a/dlls/user/clipboard.c
+++ b/dlls/user/clipboard.c
@@ -271,7 +271,7 @@ INT WINAPI GetClipboardFormatNameA(UINT wFormat, LPSTR retStr, INT maxlen)

    ret = GetClipboardFormatNameW( wFormat, p, maxlen );

-    if (maxlen > 0 && !WideCharToMultiByte( CP_ACP, 0, p, -1, retStr, maxlen, 0, 0))
+    if (ret && maxlen > 0 && !WideCharToMultiByte( CP_ACP, 0, p, -1, retStr, maxlen, 0, 0))
        retStr[maxlen-1] = 0;
    HeapFree( GetProcessHeap(), 0, p );
    return ret;