[Media] move media services restart alert to BNotification (easy)

[diver]

Clicking the "restart media services" button opens a status window that looks like an alert with no buttons. Since this is non-blocking, it should use the BNotification API instead to show a standard notification.

[MrPingouin]

I start working on this one.

[MrPingouin]

This patch updates preferences/media application, and libmedia.so at the same time.

[pulkomandy]

The shutdown_media_server is part of the public BeOS API: ​file:///boot/system/documentation/BeBook/TheMediaKit_Functions.html

So you are not allowed to change it to remove the "message" parameter to the callback, this would break compatibility with BeOS. Other parts of the changes look fine.

[MrPingouin]

Done. Patch is fixing Media preferences only.

[pulkomandy]

There are some style issues now:

• no newline between if and opening brace:

  if (condition) {
  ...
  }
  

• I think some lines of code are now longer than 80 chars.

[MrPingouin]

As requested by Pulkomandy, this version uses only local variables instead of pointers variables.

[MrPingouin]

Patch was not working. I did a pull --rebase and a reset --hard HEAD~1 to generate this one.

Everything should be ok except that I mispelled the file :)

[pulkomandy]

Applied the patch and more fixes in hrev48501.