winmm: Handle NULL szFileName in mmioOpen16 (Coverity).

8ba51495 · Marcus Meissner · Alexandre Julliard · 1ae60177 · 8ba51495
Commit 8ba51495 authored Oct 17, 2009 by Marcus Meissner Committed by Alexandre Julliard Oct 19, 2009
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mmio.c dlls/winmm/mmio.c +2 -0

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--- a/dlls/winmm/mmio.c
+++ b/dlls/winmm/mmio.c
@@ -598,6 +598,8 @@ static HMMIO MMIO_Open(LPSTR szFileName, MMIOINFO* refmminfo, DWORD dwOpenFlags,
    if (dwOpenFlags & (MMIO_PARSE|MMIO_EXIST)) {
 	char	buffer[MAX_PATH];

+	if (!szFileName)
+	    return (HMMIO)FALSE;
 	if (GetFullPathNameA(szFileName, sizeof(buffer), buffer, NULL) >= sizeof(buffer))
 	    return (HMMIO)FALSE;
 	if ((dwOpenFlags & MMIO_EXIST) && (GetFileAttributesA(buffer) == INVALID_FILE_ATTRIBUTES))