Handle declaration clarification (mmsystem.c)

[Vincent Béron]

Changelog:
Vincent Béron <<vberon at mecano.gme.usherb.ca>>

  dlls/winmm/mmsystem.c:
   - Changes some handle definitions to the proper type.
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diff -urN wine-20020323-1555/dlls/winmm/mmsystem.c wine-20020323-1555-HACMOBJ/dlls/winmm/mmsystem.c
--- wine-20020323-1555/dlls/winmm/mmsystem.c	Tue Mar 12 10:37:47 2002
+++ wine-20020323-1555-HACMOBJ/dlls/winmm/mmsystem.c	Mon Mar 25 00:03:53 2002
@@ -846,7 +846,7 @@
 static	UINT  MMSYSTEM_mixerOpen(LPHMIXER lphMix, UINT uDeviceID, DWORD dwCallback,
 				 DWORD dwInstance, DWORD fdwOpen, BOOL bFrom32) 
 {
-    HANDLE		hMix;
+    HMIXER		hMix;
     LPWINE_MLD		wmld;
     DWORD		dwRet = 0;
     MIXEROPENDESC	mod;
@@ -2080,7 +2080,7 @@
 				      LPDWORD lpdwInstance, LPDWORD lpdwFlags, 
 				      DWORD cIDs, MIDIOPENSTRMID* lpIDs, BOOL bFrom32)
 {
-    HANDLE	      	hMidiOut;
+    HMIDIOUT	      	hMidiOut;
     LPWINE_MIDI		lpwm;
     UINT		size;
     
@@ -2620,7 +2620,7 @@
 static	UINT MMSYSTEM_midiInOpen(HMIDIIN* lphMidiIn, UINT uDeviceID, DWORD dwCallback, 
 				 DWORD dwInstance, DWORD dwFlags, BOOL bFrom32)
 {
-    HMIDI		hMidiIn;
+    HMIDIIN		hMidiIn;
     LPWINE_MIDI		lpwm;
     DWORD		dwRet = 0;