dsound: Recalculate 3d buffer on SetVolume

[Maarten Lankhorst]

3d buffer has to be recalculated when volume changes.

Thanks to Peter Don Tychsen for reporting this.
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>From 2118a03cb41cd191cd819b307f881c40bad40bec Mon Sep 17 00:00:00 2001
From: Maarten Lankhorst <m.b.lankhorst at gmail.com>
Date: Wed, 30 May 2007 18:31:21 +0200
Subject: [PATCH] dsound: Recalculate 3d buffer on SetVolume

---
 dlls/dsound/buffer.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/dlls/dsound/buffer.c b/dlls/dsound/buffer.c
index 4431212..0eb1ac1 100644
--- a/dlls/dsound/buffer.c
+++ b/dlls/dsound/buffer.c
@@ -293,6 +293,9 @@ static HRESULT WINAPI IDirectSoundBufferImpl_SetVolume(
 	if (This->dsbd.dwFlags & DSBCAPS_CTRL3D) {
 		oldVol = This->ds3db_lVolume;
 		This->ds3db_lVolume = vol;
+		if (vol != oldVol)
+			/* recalc 3d volume, which in turn recalcs the pans */
+			DSOUND_Calc3DBuffer(This);
 	} else {
 		oldVol = This->volpan.lVolume;
 		This->volpan.lVolume = vol;
-- 
1.4.4.2