update: Make sure we don't leak.

This fix also a crash because of a non joined thread on Mac OS X.

modules/gui/macosx/intf.m

@@ -672,6 +672,8 @@ static VLCMain *_o_sharedMainInstance = nil;
     /* remove global observer watching for vout device changes correctly */
     [[NSNotificationCenter defaultCenter] removeObserver: self];
 
+    [o_update end];
+
     /* release some other objects here, because it isn't sure whether dealloc
      * will be called later on */
 

modules/gui/macosx/update.h

@@ -47,6 +47,8 @@
     bool b_checked;
 }
 
+- (void)end;
+
 - (IBAction)download:(id)sender;
 - (IBAction)okay:(id)sender;
 - (IBAction)changeCheckUpdateOnStartup:(id)sender;

modules/gui/macosx/update.m

@@ -69,6 +69,11 @@ static VLCUpdate *_o_sharedInstance = nil;
     return _o_sharedInstance;
 }
 
+- (void)end
+{
+    if( p_u ) update_Delete( p_u );
+}
+
 - (void)awakeFromNib
 {
     /* we don't use - (BOOL)shouldCheckUpdateOnStartup because we don't want

src/misc/update.c

@@ -1074,6 +1074,7 @@ void update_Delete( update_t *p_update )
         assert( !p_update->p_download );
         vlc_object_kill( p_update->p_check );
         vlc_thread_join( p_update->p_check );
+        vlc_object_release( p_update->p_check );
     }
     else if( p_update->p_download )
     {