message: Fix edge.fast color unpacking in vert shader
diff: @@ -5,6 +5,8 @@ uniform mat3 u_matrix;
  varying vec4 v_color;
  +const float bias = 255.0 / 254.0;
  +
  void main() {
  // Scale from [[-1 1] [-1 1]] to the container:
  gl_Position = vec4(
  @@ -15,4 +17,5 @@ void main() {
  // Extract the color:
  v_color = a_color;
  + v_color.a *= bias;
  }
  