Blind fix of -Werror,-Wpointer-to-int-cast in apple_remote

(That warning is probably new in recent Clang 10 trunk, hence the issue only got
reported now.)

To me, this looks like a bug introduced with

> commit aaf218d025
> Author: ericb2 <ericb2@apache.org>
> AuthorDate: Sun Oct 30 22:57:34 2011 +0000
> Commit:     Thorsten Behrens <tbehrens@suse.com>
> CommitDate: Mon Dec 5 13:00:11 2011 +0100
>
>     Propragating the modif in the implementation (HIDRemoteControlDevice.m)
>
>      * found under MIT-style at svn rev 1195272 (http://svn.apache.org/viewvc?view=revision&revision=1195272)
>
> diff --git a/apple_remote/HIDRemoteControlDevice.m b/apple_remote/HIDRemoteControlDevice.m
> index 94215900717b..2cd7506e60d3 100644
> --- a/apple_remote/HIDRemoteControlDevice.m
> +++ b/apple_remote/HIDRemoteControlDevice.m
> @@ -281,7 +281,17 @@ - (void) handleEventWithCookieString: (NSString*) cookieString sumOfValues: (SIn
>
>         NSNumber* buttonId = [[self cookieToButtonMapping] objectForKey: cookieString];
>         if (buttonId != nil) {
> -               [self sendRemoteButtonEvent: [buttonId intValue] pressedDown: (sumOfValues>0)];
> +       switch ( (int)buttonId )
> +       {
> +       case kMetallicRemote2009ButtonPlay:
> +       case kMetallicRemote2009ButtonMiddlePlay:
> +           buttonId = [NSNumber numberWithInt:kRemoteButtonPlay];
> +           break;
> +       default:
> +           break;
> +       }
> +       [self sendRemoteButtonEvent: [buttonId intValue] pressedDown: (sumOfValues>0)];
> +
>         } else {
>                 // let's see if a number of events are stored in the cookie string. this does
>                 // happen when the main thread is too busy to handle all incoming events in time.

(which indeed appears to be a faithful copy of all the non-whitespace changes
made at the cited <http://svn.apache.org/viewvc?view=revision&revision=1195272>
"Propragating the modif in the implementation (HIDRemoteControlDevice.m)").

I assume that my fix here is what was originally intended, but I don't know how
to actually test this code (if it is still testable at all).

Change-Id: If8faa8e068c7d7dffb4677efdaa5896cf6fd4c0e
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/89209
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

apple_remote/source/HIDRemoteControlDevice.m

@@ -286,7 +286,7 @@ cleanup:
 
     NSNumber* buttonId = [[self cookieToButtonMapping] objectForKey: cookieString];
     if (buttonId != nil) {
-       switch ( (int)buttonId )
+       switch ( [buttonId intValue] )
        {
        case kMetallicRemote2009ButtonPlay:
        case kMetallicRemote2009ButtonMiddlePlay: