Fix race condition that could cause safe area insets to be missing

Limelight/ViewControllers/SettingsViewController.m

@@ -14,7 +14,6 @@
 
 @implementation SettingsViewController {
     NSInteger _bitrate;
-    Boolean _adjustedForSafeArea;
 }
 
 @dynamic overrideUserInterfaceStyle;
@@ -89,9 +88,12 @@ static const int bitrateTable[] = {
         self.scrollView.contentSize = CGSizeMake(self.scrollView.contentSize.width,
                                                  highestViewY + 20);
     }
+}
 
 // Adjust the subviews for the safe area on the iPhone X.
-    if (!_adjustedForSafeArea) {
+- (void)viewSafeAreaInsetsDidChange {
+    [super viewSafeAreaInsetsDidChange];
+    
     if (@available(iOS 11.0, *)) {
         for (UIView* view in self.view.subviews) {
             // HACK: The official safe area is much too large for our purposes
@@ -102,9 +104,6 @@ static const int bitrateTable[] = {
             }
         }
     }
-
-        _adjustedForSafeArea = true;
-    }
 }
 
 - (void)viewDidLoad {