Portrait 2019 fix (#743)

Use overrideSprite instead of sprite on UIImages

Assets/Fungus/Scripts/Components/PortraitController.cs

@@ -196,7 +196,7 @@ namespace Fungus
             // Configure the portrait image
             Image portraitImage = portraitObj.GetComponent<Image>();
             portraitImage.preserveAspect = true;
-            portraitImage.sprite = character.ProfileSprite;
+            portraitImage.overrideSprite = character.ProfileSprite;
             portraitImage.color = new Color(1f, 1f, 1f, 0f);
 
             // LeanTween doesn't handle 0 duration properly
@@ -455,7 +455,7 @@ namespace Fungus
             float duration = (options.fadeDuration > 0f) ? options.fadeDuration : float.Epsilon;
 
             // Fade out a duplicate of the existing portrait image
-            if (options.character.State.portraitImage != null && options.character.State.portraitImage.sprite != null)
+            if (options.character.State.portraitImage != null && options.character.State.portraitImage.overrideSprite != null)
             {
                 GameObject tempGO = GameObject.Instantiate(options.character.State.portraitImage.gameObject);
                 tempGO.transform.SetParent(options.character.State.portraitImage.transform, false);
@@ -463,7 +463,7 @@ namespace Fungus
                 tempGO.transform.localScale = options.character.State.position.localScale;
 
                 Image tempImage = tempGO.GetComponent<Image>();
-                tempImage.sprite = options.character.State.portraitImage.sprite;
+                tempImage.overrideSprite = options.character.State.portraitImage.overrideSprite;
                 tempImage.preserveAspect = true;
                 tempImage.color = options.character.State.portraitImage.color;
 
@@ -473,10 +473,10 @@ namespace Fungus
             }
 
             // Fade in the new sprite image
-            if (options.character.State.portraitImage.sprite != options.portrait ||
+            if (options.character.State.portraitImage.overrideSprite != options.portrait ||
                 options.character.State.portraitImage.color.a < 1f)
             {
-                options.character.State.portraitImage.sprite = options.portrait;
+                options.character.State.portraitImage.overrideSprite = options.portrait;
                 options.character.State.portraitImage.color = new Color(1f, 1f, 1f, 0f);
                 LeanTween.alpha(options.character.State.portraitImage.rectTransform, 1f, duration).setEase(stage.FadeEaseType).setRecursive(false);
             }

Assets/Fungus/Scripts/Components/SayDialog.cs

@@ -394,7 +394,7 @@ namespace Fungus
 
             if (image != null)
             {
-                characterImage.sprite = image;
+                characterImage.overrideSprite = image;
                 characterImage.gameObject.SetActive(true);
                 currentCharacterImage = image;
             }