Added empty string value ("") to private string variables to avoid errors when comparing strings.

Author: killerantz

Assets/HoloToolkit-Examples/InteractiveElements/Scripts/Controls/ButtonThemeWidget.cs

@@ -42,9 +42,9 @@ public class ButtonThemeWidget : InteractiveThemeWidget
         // material
         private Material mMaterial;
 
-        private string mCheckColorThemeTag;
-        private string mCheckPositionThemeTag;
-        private string mCheckScaleThemeTag;
+        private string mCheckColorThemeTag = "";
+        private string mCheckPositionThemeTag = "";
+        private string mCheckScaleThemeTag = "";
 
         /// <summary>
         /// Get animaiton components

Assets/HoloToolkit-Examples/InteractiveElements/Scripts/Controls/ButtonThemeWidgetLabel.cs

@@ -35,8 +35,8 @@ public class ButtonThemeWidgetLabel : InteractiveThemeWidget
         // the TextMesh
         private TextMesh mText;
 
-        private string mCheckColorThemeTag;
-        private string mCheckPositionThemeTag;
+        private string mCheckColorThemeTag = "";
+        private string mCheckPositionThemeTag = "";
 
         /// <summary>
         /// Get the TextMesh and position animation component

Assets/HoloToolkit-Examples/InteractiveElements/Scripts/Controls/ButtonThemeWidgetOutline.cs

@@ -35,8 +35,8 @@ public class ButtonThemeWidgetOutline : InteractiveThemeWidget
         private ColorInteractiveTheme mInnerColorTheme;
         private ColorInteractiveTheme mOuterColorTheme;
 
-        private string mCheckInnerColorThemeTag;
-        private string mCheckOuterColorThemeTag;
+        private string mCheckInnerColorThemeTag = "";
+        private string mCheckOuterColorThemeTag = "";
 
         /// <summary>
         /// set the ColorBlender

Assets/HoloToolkit-Examples/InteractiveElements/Scripts/Widgets/MaterialColorThemeWidget.cs

@@ -26,7 +26,7 @@ public class MaterialColorThemeWidget : InteractiveThemeWidget
         private ColorInteractiveTheme mColorTheme;
         private Material mMaterial;
 
-        private string mCheckThemeTag;
+        private string mCheckThemeTag = "";
 
         void Awake()
         {

Assets/HoloToolkit-Examples/InteractiveElements/Scripts/Widgets/PositionThemeWidget.cs

@@ -24,7 +24,7 @@ public class PositionThemeWidget : InteractiveThemeWidget
 
         private Vector3InteractiveTheme mPositionTheme;
 
-        private string mCheckThemeTag;
+        private string mCheckThemeTag = "";
 
         /// <summary>
         /// Get Move to Position

Assets/HoloToolkit-Examples/InteractiveElements/Scripts/Widgets/ScaleThemeWidget.cs

@@ -25,7 +25,7 @@ public class ScaleThemeWidget : InteractiveThemeWidget
         private Vector3InteractiveTheme mScaleTheme;
         private Material mMaterial;
 
-        private string mCheckThemeTag;
+        private string mCheckThemeTag = "";
 
         /// <summary>
         /// Get Scale to Value

Assets/HoloToolkit-Examples/InteractiveElements/Scripts/Widgets/TextMeshColorThemeWidget.cs

@@ -26,7 +26,7 @@ public class TextMeshColorThemeWidget : InteractiveThemeWidget
         private ColorInteractiveTheme mTextColorTheme;
         private TextMesh mTextMesh;
 
-        private string mCheckThemeTag;
+        private string mCheckThemeTag = "";
 
         void Awake()
         {

Assets/HoloToolkit-Examples/InteractiveElements/Scripts/Widgets/TextureThemeWidget.cs

@@ -28,7 +28,7 @@ public class TextureThemeWidget : InteractiveThemeWidget
         // material to swap the texture on
         private Material mMaterial;
 
-        private string mCheckThemeTag;
+        private string mCheckThemeTag = "";
 
         void Awake()
         {