macosx: fixed interface crash on quit

 fixes #5779
(cherry picked from commit 0c4c7f06)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/gui/macosx/CoreInteraction.m

@@ -135,10 +135,22 @@ static VLCCoreInteraction *_o_sharedInstance = nil;
 
 - (int)playbackRate
 {
+    float f_rate;
+
+    input_thread_t * p_input;
+    p_input = pl_CurrentInput( VLCIntf );
+    if (p_input)
+    {
+        f_rate = var_GetFloat( p_input, "rate" );
+        vlc_object_release( p_input );
+    }
+    else
+    {
         playlist_t * p_playlist = pl_Get( VLCIntf );
+        NSLog( @"playlist rate = %f", f_rate );
+    }
 
-    float rate = var_GetFloat( p_playlist, "rate" );
-    double value = 17 * log( rate ) / log( 2. );
+    double value = 17 * log( f_rate ) / log( 2. );
     int returnValue = (int) ( ( value > 0 ) ? value + .5 : value - .5 );
 
     if( returnValue < -34 )

modules/gui/macosx/intf.m

@@ -252,7 +252,7 @@ static int InputEvent( vlc_object_t *p_this, const char *psz_var,
             [[VLCMain sharedInstance] playbackStatusUpdated];
             break;
         case INPUT_EVENT_RATE:
-            [[VLCMainMenu sharedInstance] performSelectorOnMainThread:@selector(updatePlaybackRate) withObject: nil waitUntilDone:NO];
+            [[[VLCMain sharedInstance] mainMenu] performSelectorOnMainThread:@selector(updatePlaybackRate) withObject: nil waitUntilDone:NO];
             break;
         case INPUT_EVENT_POSITION:
             [[VLCMain sharedInstance] updatePlaybackPosition];