[PATCH 1/2] dlls/mciwave.c: correctly handle error return status from mmioRead

[Eric Pouech]

Signed-off-by: Eric Pouech <eric.pouech(a)gmail.com>

Supersedes 230982

---
 dlls/mciwave/mciwave.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/mciwave/mciwave.c b/dlls/mciwave/mciwave.c
index 1d9abce84a3..3ca884ed6e0 100644
--- a/dlls/mciwave/mciwave.c
+++ b/dlls/mciwave/mciwave.c
@@ -291,7 +291,7 @@ static	DWORD WAVE_mciReadFmt(WINE_MCIWAVE* wmw, const MMCKINFO* pckMainRIFF)
     if (!pwfx) return MCIERR_OUT_OF_MEMORY;
 
     r = mmioRead(wmw->hFile, (HPSTR)pwfx, mmckInfo.cksize);
-    if (r < sizeof(PCMWAVEFORMAT)) {
+    if (r < 0 || r < sizeof(PCMWAVEFORMAT)) {
 	HeapFree(GetProcessHeap(), 0, pwfx);
 	return MCIERR_INVALID_FILE;
     }