adapting to init pattern

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67888 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/osx/cocoa/listbox.mm

@@ -161,7 +161,7 @@ protected :
 
 - (id) init
 {
-    [super init];
+    self = [super init];
     column = nil;
     return self;
 }
@@ -224,7 +224,7 @@ protected:
 
 - (id) init
 {
-    [super init];
+    self = [super init];
     impl = nil;
     return self;
 }

src/osx/cocoa/menu.mm

@@ -38,7 +38,7 @@
 
 - (id) initWithTitle:(NSString*) title
 {
-    [super initWithTitle:title];
+    self = [super initWithTitle:title];
     impl = NULL;
     return self;
 }
@@ -69,7 +69,7 @@
 
 - (id) init
 {
-    [super init];
+    self = [super init];
     return self;
 }
 

src/osx/cocoa/menuitem.mm

@@ -74,8 +74,8 @@ SEL wxOSXGetSelectorFromID(int menuId )
 
 - (id) initWithTitle:(NSString *)aString action:(SEL)aSelector keyEquivalent:(NSString *)charCode
 {
-    [super initWithTitle:aString action:aSelector keyEquivalent:charCode];
-     return self;
+    self = [super initWithTitle:aString action:aSelector keyEquivalent:charCode];
+    return self;
 }
 
 - (void) clickedAction: (id) sender