message: Fix crash for unusual failed texture load case
diff: @@ -1323,6 +1323,7 @@ namespace ospray {
  if (mat.emissiveTexture.index != -1) {
  const auto &tex = model.textures[mat.emissiveTexture.index];
  const auto &img = model.images[tex.source];
  + if (img.image.size() > 0) {
  const auto *data = img.image.data();
  const vec3f color0 = vec3f(data[0], data[1], data[2]);
  WARN << " name: " << img.name << std::endl;
  @@ -1332,6 +1333,7 @@ namespace ospray {
  ospMat->child("color") = emissiveColor * (color0 / 255.f);
  }
  }
  + }
  #if 0 // OSPRay Luminous doesn't support textured params yet.
  if (mat.emissiveTexture.texCoord != 0) {
  