macosx: introduce constants for volume default and maximum internal to the module

modules/gui/macosx/playlist/VLCPlayerController.h

@@ -227,6 +227,9 @@ extern NSString *VLCPlayerVolumeChanged;
  */
 extern NSString *VLCPlayerMuteChanged;
 
+extern const CGFloat VLCVolumeMaximum;
+extern const CGFloat VLCVolumeDefault;
+
 @interface VLCPlayerController : NSObject
 
 - (instancetype)initWithPlayer:(vlc_player_t *)player;

modules/gui/macosx/playlist/VLCPlayerController.m

@@ -71,6 +71,9 @@ NSString *VLCPlayerListOfVideoOutputThreadsChanged = @"VLCPlayerListOfVideoOutpu
 NSString *VLCPlayerVolumeChanged = @"VLCPlayerVolumeChanged";
 NSString *VLCPlayerMuteChanged = @"VLCPlayerMuteChanged";
 
+const CGFloat VLCVolumeMaximum = 2.;
+const CGFloat VLCVolumeDefault = 1.;
+
 @interface VLCPlayerController ()
 {
     vlc_player_t *_p_player;

modules/gui/macosx/windows/mainwindow/VLCMainWindowControlsBar.m

@@ -29,9 +29,6 @@
 #import "playlist/VLCPlaylistController.h"
 #import "playlist/VLCPlayerController.h"
 
-CGFloat VLCVolumeMaximum = 2.;
-CGFloat VLCVolumeDefault = 1.;
-
 /*****************************************************************************
  * VLCMainWindowControlsBar
  *

modules/gui/macosx/windows/video/VLCFSPanelController.m

@@ -25,8 +25,6 @@
 
 #import "VLCFSPanelController.h"
 
-#import <vlc_aout.h>
-
 #import "extensions/NSString+Helpers.h"
 #import "main/VLCMain.h"
 #import "playlist/VLCPlaylistController.h"
@@ -150,9 +148,9 @@ static NSString *kAssociatedFullscreenRect = @"VLCFullscreenAssociatedWindowRect
                 _NS("Adjust the current playback position"));
 
     /* Setup other controls */
-    [_volumeSlider setMaxValue:2.0];
+    [_volumeSlider setMaxValue:VLCVolumeMaximum];
     [_volumeSlider setFloatValue:_playerController.volume];
-    [_volumeSlider setDefaultValue:1.0];
+    [_volumeSlider setDefaultValue:VLCVolumeDefault];
 
     /* Identifier to store the state of the remaining or total time label,
      * this is the same identifier as used for the window playback cotrols