message: Fix warning in WebGL builds
diff: @@ -2286,7 +2286,6 @@ void OpenGLDriver::bindSamplers(size_t index, Handle<HwSamplerGroup> sbh) {
  GLuint OpenGLDriver::getSamplerSlow(SamplerParams params) const noexcept {
  assert(mSamplerMap.find(params.u) == mSamplerMap.end());
  - auto& gl = mContext;
  GLuint s;
  glGenSamplers(1, &s);
  @@ -2299,6 +2298,7 @@ GLuint OpenGLDriver::getSamplerSlow(SamplerParams params) const noexcept {
  glSamplerParameteri(s, GL_TEXTURE_COMPARE_FUNC, getTextureCompareFunc(params.compareFunc));
  // TODO: Why does this fail with WebGL 2.0? The run-time check should suffice.
  #if defined(GL_EXT_texture_filter_anisotropic) && !defined(__EMSCRIPTEN__)
  + auto& gl = mContext;
  if (gl.ext.texture_filter_anisotropic) {
  GLfloat anisotropy = float(1u << params.anisotropyLog2);
  glSamplerParameterf(s, GL_TEXTURE_MAX_ANISOTROPY_EXT, std::min(gl.gets.maxAnisotropy, anisotropy));
  