Fixed a bunch of warnings on the OS X backend.

darwin/button.m

@@ -7,7 +7,7 @@
 	void *onClickedData;
 }
 - (IBAction)buttonClicked:(id)sender;
-- (void)setButton:(uiButton *)b;
+- (void)setButton:(uiButton *)newb;
 - (void)setOnClicked:(void (*)(uiButton *, void *))f data:(void *)data;
 @end
 
@@ -18,9 +18,9 @@
 	(*(self->onClicked))(self->b, self->onClickedData);
 }
 
-- (void)setButton:(uiButton *)b
+- (void)setButton:(uiButton *)newb
 {
-	self->b = b;
+	self->b = newb;
 }
 
 - (void)setOnClicked:(void (*)(uiButton *, void *))f data:(void *)data

darwin/checkbox.m

@@ -7,7 +7,7 @@
 	void *onToggledData;
 }
 - (IBAction)checkboxToggled:(id)sender;
-- (void)setCheckbox:(uiCheckbox *)c;
+- (void)setCheckbox:(uiCheckbox *)newc;
 - (void)setOnToggled:(void (*)(uiCheckbox *, void *))f data:(void *)data;
 @end
 
@@ -18,9 +18,9 @@
 	(*(self->onToggled))(self->c, self->onToggledData);
 }
 
-- (void)setCheckbox:(uiCheckbox *)c
+- (void)setCheckbox:(uiCheckbox *)newc
 {
-	self->c = c;
+	self->c = newc;
 }
 
 - (void)setOnToggled:(void (*)(uiCheckbox *, void *))f data:(void *)data

darwin/container.m

@@ -130,7 +130,6 @@ static void containerHide(uiControl *cc)
 
 static void containerEnable(uiControl *cc)
 {
-	containerView *c = (containerView *) (cc->Internal);
 	uiControlSysFuncParams p;
 
 	p.Func = uiDarwinSysFuncContainerEnable;
@@ -139,7 +138,6 @@ static void containerEnable(uiControl *cc)
 
 static void containerDisable(uiControl *cc)
 {
-	containerView *c = (containerView *) (cc->Internal);
 	uiControlSysFuncParams p;
 
 	p.Func = uiDarwinSysFuncContainerDisable;

darwin/entry.m

@@ -1,13 +1,13 @@
 // 9 april 2015
 #import "uipriv_darwin.h"
 
-@interface entryDelegate : NSObject {
+@interface entryDelegate : NSObject <NSTextFieldDelegate> {
 	uiEntry *e;
 	void (*onChanged)(uiEntry *, void *);
 	void *onChangedData;
 }
 - (void)controlTextDidChange:(NSNotification *)note;
-- (void)setEntry:(uiEntry *)e;
+- (void)setEntry:(uiEntry *)newe;
 - (void)setOnChanged:(void (*)(uiEntry *, void *))f data:(void *)data;
 @end
 
@@ -18,9 +18,9 @@
 	(*(self->onChanged))(self->e, self->onChangedData);
 }
 
-- (void)setEntry:(uiEntry *)e
+- (void)setEntry:(uiEntry *)newe
 {
-	self->e = e;
+	self->e = newe;
 }
 
 - (void)setOnChanged:(void (*)(uiEntry *, void *))f data:(void *)data

darwin/menu.m

@@ -66,8 +66,8 @@ enum {
 
 - (IBAction)onQuitClicked:(id)sender
 {
-	if ([[NSApp delegate] applicationShouldTerminate:NSApp] == NSTerminateNow)
-		[NSApp terminate:self];
+	if (shouldQuit())
+		uiQuit();
 }
 
 - (void)register:(NSMenuItem *)item to:(struct menuItem *)smi