Fix badge should not reset

lib/ios/RNNBasePresenter.m

 - (void)applyOptions:(RNNNavigationOptions *)options {
 	UIViewController* viewController = self.bindedViewController;
 	
-	if ([viewController.parentViewController isKindOfClass:[UITabBarController class]]) {
-		[viewController rnn_setTabBarItemBadge:[options.bottomTab.badge getWithDefaultValue:nil]];
+	if (options.bottomTab.badge.hasValue && [viewController.parentViewController isKindOfClass:[UITabBarController class]]) {
+		[viewController rnn_setTabBarItemBadge:options.bottomTab.badge.get];
 	}
 }
 

lib/ios/ReactNativeNavigationTests/RNNBasePresenterTest.m

 	self.bindedViewController = nil;
 }
 
-- (void)testApplyOptions_shouldSetTabBarItemBadgeWithDefaultWhenParentIsUITabBarController {
-	OCMStub([self.mockBindedViewController parentViewController]).andReturn([UITabBarController new]);
-	[[self.mockBindedViewController expect] rnn_setTabBarItemBadge:nil];
-	[self.uut applyOptions:self.options];
-	[self.mockBindedViewController verify];
-}
-
 - (void)testApplyOptions_shouldSetTabBarItemBadgeOnlyWhenParentIsUITabBarController {
 	[[self.mockBindedViewController reject] rnn_setTabBarItemBadge:[OCMArg any]];
 	[self.uut applyOptions:self.options];
 	[self.mockBindedViewController verify];
 }
 
+- (void)testApplyOptions_setTabBarItemBadgeShouldWhenNoValue {
+	[self.uut bindViewController:self.mockBindedViewController];
+	self.options.bottomTab.badge = nil;
+	[[self.mockBindedViewController reject] rnn_setTabBarItemBadge:[OCMArg any]];
+	[self.uut applyOptions:self.options];
+	[self.mockBindedViewController verify];
+}
+
 @end