Fixed a heap bug.

59ae7d94 · Andreas Mohr · Alexandre Julliard · a00b49f0 · 59ae7d94
Commit 59ae7d94 authored Dec 07, 1998 by Andreas Mohr Committed by Alexandre Julliard Dec 07, 1998
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mmsystem.c multimedia/mmsystem.c +1 -1

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--- a/multimedia/mmsystem.c
+++ b/multimedia/mmsystem.c
@@ -2062,7 +2062,7 @@ int	MCI_UnMapMsg16To32A(WORD uDevTyp, WORD wMsg, DWORD lParam)
 	    
 	    mop16->wDeviceID = mop32a->wDeviceID;
 	}
-	HeapFree(SystemHeap, 0, (LPVOID)lParam);
+	HeapFree(SystemHeap, 0, (LPVOID)(lParam - sizeof(LPMCI_OPEN_PARMS16)));
 	return 0;
    default:
 	FIXME(mci, "Map/Unmap internal error on msg=%s\n", MCI_CommandToString(wMsg));