msacm32: Constify some variables

[Andrew Talbot]

Changelog:
    msacm32: Constify some variables.

diff -urN a/dlls/msacm32/internal.c b/dlls/msacm32/internal.c
--- a/dlls/msacm32/internal.c	2007-01-12 11:40:53.000000000 +0000
+++ b/dlls/msacm32/internal.c	2007-05-27 16:56:46.000000000 +0100
@@ -113,7 +113,7 @@
  *	Returns TRUE is the format tag fmtTag is present in the cache.
  *	If so, idx is set to its index.
  */
-BOOL MSACM_FindFormatTagInCache(WINE_ACMDRIVERID* padid, DWORD fmtTag, LPDWORD idx)
+BOOL MSACM_FindFormatTagInCache(const WINE_ACMDRIVERID* padid, DWORD fmtTag, LPDWORD idx)
 {
     unsigned 	i;
 
@@ -249,7 +249,7 @@
 /***********************************************************************
  *           MSACM_WriteCache
  */
-static	BOOL MSACM_WriteCache(PWINE_ACMDRIVERID padid)
+static	BOOL MSACM_WriteCache(const WINE_ACMDRIVERID *padid)
 {
     LPWSTR	key = MSACM_GetRegistryKey(padid);
     HKEY	hKey;
@@ -259,11 +259,11 @@
     if (RegCreateKeyW(HKEY_LOCAL_MACHINE, key, &hKey))
 	goto errCleanUp;
 
-    if (RegSetValueExA(hKey, "cFormatTags", 0, REG_DWORD, (void*)&padid->cFormatTags, sizeof(DWORD)))
+    if (RegSetValueExA(hKey, "cFormatTags", 0, REG_DWORD, (const void*)&padid->cFormatTags, sizeof(DWORD)))
 	goto errCleanUp;
-    if (RegSetValueExA(hKey, "cFilterTags", 0, REG_DWORD, (void*)&padid->cFilterTags, sizeof(DWORD)))
+    if (RegSetValueExA(hKey, "cFilterTags", 0, REG_DWORD, (const void*)&padid->cFilterTags, sizeof(DWORD)))
 	goto errCleanUp;
-    if (RegSetValueExA(hKey, "fdwSupport", 0, REG_DWORD, (void*)&padid->fdwSupport, sizeof(DWORD)))
+    if (RegSetValueExA(hKey, "fdwSupport", 0, REG_DWORD, (const void*)&padid->fdwSupport, sizeof(DWORD)))
 	goto errCleanUp;
     if (RegSetValueExA(hKey, "aFormatTagCache", 0, REG_BINARY,
 		       (void*)padid->aFormatTag,
@@ -456,7 +456,7 @@
 /***********************************************************************
  *           MSACM_UnRegisterNotificationWindow()
  */
-PWINE_ACMNOTIFYWND MSACM_UnRegisterNotificationWindow(PWINE_ACMNOTIFYWND panwnd)
+PWINE_ACMNOTIFYWND MSACM_UnRegisterNotificationWindow(const WINE_ACMNOTIFYWND *panwnd)
 {
     PWINE_ACMNOTIFYWND p;
 
diff -urN a/dlls/msacm32/wineacm.h b/dlls/msacm32/wineacm.h
--- a/dlls/msacm32/wineacm.h	2006-05-23 13:48:13.000000000 +0100
+++ b/dlls/msacm32/wineacm.h	2007-05-27 16:56:59.000000000 +0100
@@ -382,7 +382,7 @@
 extern PWINE_ACMOBJ MSACM_GetObj(HACMOBJ hObj, DWORD type);
 
 extern MMRESULT MSACM_Message(HACMDRIVER, UINT, LPARAM, LPARAM);
-extern BOOL MSACM_FindFormatTagInCache(WINE_ACMDRIVERID*, DWORD, LPDWORD);
+extern BOOL MSACM_FindFormatTagInCache(const WINE_ACMDRIVERID*, DWORD, LPDWORD);
 
 extern void MSACM_RePositionDriver(PWINE_ACMDRIVERID, DWORD);
 extern void MSACM_WriteCurrentPriorities(void);
@@ -390,7 +390,7 @@
 extern void MSACM_DisableNotifications(void);
 extern void MSACM_EnableNotifications(void);
 extern PWINE_ACMNOTIFYWND MSACM_RegisterNotificationWindow(HWND hNotifyWnd, DWORD dwNotifyMsg);
-extern PWINE_ACMNOTIFYWND MSACM_UnRegisterNotificationWindow(PWINE_ACMNOTIFYWND);
+extern PWINE_ACMNOTIFYWND MSACM_UnRegisterNotificationWindow(const WINE_ACMNOTIFYWND*);
 
 extern PWINE_ACMDRIVERID MSACM_RegisterDriverFromRegistry(LPCWSTR pszRegEntry);