eliminate all warnings by switching NSOpenPanel/NSSavePanels to use completion handler blocks

macosx/AddMagnetWindowController.m

@@ -39,8 +39,6 @@
 
 - (void) setDestinationPath: (NSString *) destination;
 
-- (void) folderChoiceClosed: (NSOpenPanel *) openPanel returnCode: (NSInteger) code contextInfo: (void *) contextInfo;
-
 - (void) setGroupsMenu;
 - (void) changeGroupValue: (id) sender;
 
@@ -132,8 +130,15 @@
     [panel setMessage: [NSString stringWithFormat: NSLocalizedString(@"Select the download folder for \"%@\"",
                         "Add -> select destination folder"), [fTorrent name]]];
     
-    [panel beginSheetForDirectory: nil file: nil types: nil modalForWindow: [self window] modalDelegate: self
-            didEndSelector: @selector(folderChoiceClosed:returnCode:contextInfo:) contextInfo: nil];
+    [panel beginSheetModalForWindow: [self window] completionHandler: ^(NSInteger result) {
+        if (result == NSFileHandlingPanelOKButton)
+            [self setDestinationPath: [[[panel URLs] objectAtIndex: 0] path]];
+        else
+        {
+            if (!fDestination)
+                [self performSelectorOnMainThread: @selector(cancelAdd:) withObject: nil waitUntilDone: NO];
+        }
+    }];
 }
 
 - (void) add: (id) sender
@@ -227,17 +232,6 @@
     [iconTransformer release];
 }
 
-- (void) folderChoiceClosed: (NSOpenPanel *) openPanel returnCode: (NSInteger) code contextInfo: (void *) contextInfo
-{
-    if (code == NSOKButton)
-        [self setDestinationPath: [[[openPanel URLs] objectAtIndex: 0] path]];
-    else
-    {
-        if (!fDestination)
-            [self performSelectorOnMainThread: @selector(cancelAdd:) withObject: nil waitUntilDone: NO];
-    }
-}
-
 - (void) setGroupsMenu
 {
     NSMenu * groupMenu = [[GroupsController groups] groupMenuWithTarget: self action: @selector(changeGroupValue:) isSmall: NO];