message: fix(svg): textRotate bug when transform is null
  ecomfe/incubator-echarts#8282
diff: @@ -419,6 +419,7 @@ var svgTextDrawRectText = function (el, rect, textRect) {
  var pos = el.transformCoordToGlobal(rect.x, rect.y);
  rect.x = pos[0];
  rect.y = pos[1];
  + el.transform = matrix.identity(matrix.create());
  }
  // Text rotation, but no element transform
  