Specify correct buffer size in GetPrivateProfileStringW calls.

dlls/winmm/driver.c

@@ -226,7 +226,7 @@ BOOL	DRIVER_GetLibName(LPCWSTR keyName, LPCWSTR sectName, LPWSTR buf, int sz)
     if (lRet == ERROR_SUCCESS) return TRUE;
     /* default to system.ini if we can't find it in the registry,
      * to support native installations where system.ini is still used */
-    return GetPrivateProfileStringW(sectName, keyName, &wsznull, buf, sz, wszSystemIni);
+    return GetPrivateProfileStringW(sectName, keyName, &wsznull, buf, sz / sizeof(WCHAR), wszSystemIni);
 }
 
 /**************************************************************************

dlls/winmm/mci.c

@@ -1844,7 +1844,7 @@ static	DWORD MCI_SysInfo(UINT uDevID, DWORD dwFlags, LPMCI_SYSINFO_PARMSW lpParm
 		    RegQueryInfoKeyW( hKey, 0, 0, 0, &cnt, 0, 0, 0, 0, 0, 0, 0);
 		    RegCloseKey( hKey );
 		}
-		if (GetPrivateProfileStringW(wszMci, 0, wszNull, buf, sizeof(buf), wszSystemIni))
+		if (GetPrivateProfileStringW(wszMci, 0, wszNull, buf, sizeof(buf) / sizeof(buf[0]), wszSystemIni))
 		    for (s = buf; *s; s += strlenW(s) + 1) cnt++;
 	    }
 	} else {
@@ -1896,7 +1896,7 @@ static	DWORD MCI_SysInfo(UINT uDevID, DWORD dwFlags, LPMCI_SYSINFO_PARMSW lpParm
 	        RegCloseKey( hKey );
 	    }
 	    if (!s) {
-		if (GetPrivateProfileStringW(wszMci, 0, wszNull, buf, sizeof(buf), wszSystemIni)) {
+		if (GetPrivateProfileStringW(wszMci, 0, wszNull, buf, sizeof(buf) / sizeof(buf[0]), wszSystemIni)) {
 		    for (p = buf; *p; p += strlenW(p) + 1, cnt++) {
                         TRACE("%ld: %s\n", cnt, debugstr_w(p));
 			if (cnt == lpParms->dwNumber - 1) {