message: Fixes NineSlicePlane resize problem
diff: @@ -74,7 +74,7 @@ export default class NineSlicePlane extends Plane
  * @memberof PIXI.NineSlicePlane#
  * @override
  */
  - this.leftWidth = typeof leftWidth !== 'undefined' ? leftWidth : DEFAULT_BORDER_SIZE;
  + this._leftWidth = typeof leftWidth !== 'undefined' ? leftWidth : DEFAULT_BORDER_SIZE;
  /**
  * The width of the right column (b)
  @@ -83,7 +83,7 @@ export default class NineSlicePlane extends Plane
  * @memberof PIXI.NineSlicePlane#
  * @override
  */
  - this.rightWidth = typeof rightWidth !== 'undefined' ? rightWidth : DEFAULT_BORDER_SIZE;
  + this._rightWidth = typeof rightWidth !== 'undefined' ? rightWidth : DEFAULT_BORDER_SIZE;
  /**
  * The height of the top row (c)
  @@ -92,7 +92,7 @@ export default class NineSlicePlane extends Plane
  * @memberof PIXI.NineSlicePlane#
  * @override
  */
  - this.topHeight = typeof topHeight !== 'undefined' ? topHeight : DEFAULT_BORDER_SIZE;
  + this._topHeight = typeof topHeight !== 'undefined' ? topHeight : DEFAULT_BORDER_SIZE;
  /**
  * The height of the bottom row (d)
  @@ -101,7 +101,7 @@ export default class NineSlicePlane extends Plane
  * @memberof PIXI.NineSlicePlane#
  * @override
  */
  - this.bottomHeight = typeof bottomHeight !== 'undefined' ? bottomHeight : DEFAULT_BORDER_SIZE;
  + this._bottomHeight = typeof bottomHeight !== 'undefined' ? bottomHeight : DEFAULT_BORDER_SIZE;
  this.refresh(true);
  }
  @@ -114,8 +114,11 @@ export default class NineSlicePlane extends Plane
  {
  const vertices = this.vertices;
  - vertices[9] = vertices[11] = vertices[13] = vertices[15] = this._topHeight;
  - vertices[17] = vertices[19] = vertices[21] = vertices[23] = this._height - this._bottomHeight;
  + const h = this._topHeight + this._bottomHeight;
  + const scale = this._height > h ? 1.0 : this._height / h;
  +
  + vertices[9] = vertices[11] = vertices[13] = vertices[15] = this._topHeight * scale;
  + vertices[17] = vertices[19] = vertices[21] = vertices[23] = this._height - (this._bottomHeight * scale);
  vertices[25] = vertices[27] = vertices[29] = vertices[31] = this._height;
  }
  @@ -127,8 +130,11 @@ export default class NineSlicePlane extends Plane
  {
  const vertices = this.vertices;
  - vertices[2] = vertices[10] = vertices[18] = vertices[26] = this._leftWidth;
  - vertices[4] = vertices[12] = vertices[20] = vertices[28] = this._width - this._rightWidth;
  + const w = this._leftWidth + this._rightWidth;
  + const scale = this._width > w ? 1.0 : this._width / w;
  +
  + vertices[2] = vertices[10] = vertices[18] = vertices[26] = this._leftWidth * scale;
  + vertices[4] = vertices[12] = vertices[20] = vertices[28] = this._width - (this._rightWidth * scale);
  vertices[6] = vertices[14] = vertices[22] = vertices[30] = this._width;
  }
  