dsound: Fix the declaration/definition of DSOUND_timer().

dlls/dsound/dsound_private.h

@@ -445,7 +445,7 @@ void DSOUND_WaveQueue(DirectSoundDevice *device, DWORD mixq);
 void DSOUND_RecalcVolPan(PDSVOLUMEPAN volpan);
 void DSOUND_AmpFactorToVolPan(PDSVOLUMEPAN volpan);
 void DSOUND_RecalcFormat(IDirectSoundBufferImpl *dsb);
-void CALLBACK DSOUND_timer(UINT timerID, UINT msg, DWORD dwUser, DWORD dw1, DWORD dw2);
+void CALLBACK DSOUND_timer(UINT timerID, UINT msg, DWORD_PTR dwUser, DWORD_PTR dw1, DWORD_PTR dw2);
 void CALLBACK DSOUND_callback(HWAVEOUT hwo, UINT msg, DWORD dwUser, DWORD dw1, DWORD dw2);
 
 /* sound3d.c */

dlls/dsound/mixer.c

@@ -1107,7 +1107,8 @@ static void DSOUND_PerformMix(DirectSoundDevice *device)
 	}
 }
 
-void CALLBACK DSOUND_timer(UINT timerID, UINT msg, DWORD dwUser, DWORD dw1, DWORD dw2)
+void CALLBACK DSOUND_timer(UINT timerID, UINT msg, DWORD_PTR dwUser,
+                           DWORD_PTR dw1, DWORD_PTR dw2)
 {
         DirectSoundDevice * device = (DirectSoundDevice*)dwUser;
 	DWORD start_time =  GetTickCount();