Fixed build warnings

Author: TimOliver

TOPasscodeViewController/Views/Main/TOPasscodeKeypadView.m

@@ -275,13 +275,13 @@ - (void)setHorizontalLayout:(BOOL)horizontalLayout animated:(BOOL)animated durat
     self.horizontalZeroButton.contentAlpha = _horizontalLayout ? 0.0f : 1.0f;
 
     void (^animationBlock)(void) = ^{
-        self.verticalZeroButton.contentAlpha = _horizontalLayout ? 0.0f : 1.0f;
-        self.horizontalZeroButton.contentAlpha = _horizontalLayout ? 1.0f : 0.0f;
+        self.verticalZeroButton.contentAlpha = self.horizontalLayout ? 0.0f : 1.0f;
+        self.horizontalZeroButton.contentAlpha = self.horizontalLayout ? 1.0f : 0.0f;
     };
 
     void (^completionBlock)(BOOL) = ^(BOOL complete) {
-        self.verticalZeroButton.hidden = _horizontalLayout;
-        self.horizontalZeroButton.hidden = !_horizontalLayout;
+        self.verticalZeroButton.hidden = self.horizontalLayout;
+        self.horizontalZeroButton.hidden = self.horizontalLayout;
     };
 
     // Don't animate if not needed

TOPasscodeViewController/Views/Shared/TOPasscodeInputField.m

@@ -251,9 +251,10 @@ - (void)resetPasscodeAnimated:(BOOL)animated playImpact:(BOOL)impact
 {
     [self setPasscode:nil animated:animated];
 
-    if (impact) {
+    // Play a negative impact effect
+    if (@available(iOS 9.0, *)) {
         // https://stackoverflow.com/questions/41444274/how-to-check-if-haptic-engine-uifeedbackgenerator-is-supported
-        AudioServicesPlaySystemSoundWithCompletion(1521, nil);
+        if (impact) { AudioServicesPlaySystemSoundWithCompletion(1521, nil); }
     }
 
     if (!animated) { return; }