dmcompos: IsParamSupported of DMChordMapTrack doesn't crashes on NULL.

d9aa14c5 · Michael Stefaniuc · Alexandre Julliard · 8fae7fd4 · d9aa14c5
Commit d9aa14c5 authored Jun 25, 2015 by Michael Stefaniuc Committed by Alexandre Julliard Jun 25, 2015
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chordmaptrack.c dlls/dmcompos/chordmaptrack.c +4 -0

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--- a/dlls/dmcompos/chordmaptrack.c
+++ b/dlls/dmcompos/chordmaptrack.c
@@ -139,6 +139,10 @@ static HRESULT WINAPI IDirectMusicChordMapTrack_IDirectMusicTrack_SetParam (LPDI
 static HRESULT WINAPI IDirectMusicChordMapTrack_IDirectMusicTrack_IsParamSupported (LPDIRECTMUSICTRACK8 iface, REFGUID rguidType) {
 	ICOM_THIS_MULTI(IDirectMusicChordMapTrack, TrackVtbl, iface);
 	TRACE("(%p, %s)\n", This, debugstr_dmguid(rguidType));
+
+        if (!rguidType)
+                return E_POINTER;
+
 	if (IsEqualGUID (rguidType, &GUID_IDirectMusicChordMap)) {
 		TRACE("param supported\n");
 		return S_OK;