Merge pull request #388 from UnityTech/fix_bug

Fix bug in shifted box.

Author: zhuxingwei

Runtime/rendering/shifted_box.cs

@@ -601,7 +601,7 @@ public RenderFractionallySizedOverflowBox(
         public float? widthFactor {
             get { return this._widthFactor; }
             set {
-                if (this._widthFactor != value) {
+                if (this._widthFactor == value) {
                     return;
                 }
 
@@ -615,7 +615,7 @@ public float? widthFactor {
         public float? heightFactor {
             get { return this._heightFactor; }
             set {
-                if (this._heightFactor != value) {
+                if (this._heightFactor == value) {
                     return;
                 }
 
@@ -842,7 +842,7 @@ public RenderBaseline(
         public float baseline {
             get { return this._baseline; }
             set {
-                if (this._baseline != value) {
+                if (this._baseline == value) {
                     return;
                 }
 
@@ -857,7 +857,7 @@ public float baseline {
         public TextBaseline baselineType {
             get { return this._baselineType; }
             set {
-                if (this._baselineType != value) {
+                if (this._baselineType == value) {
                     return;
                 }