message: fix incorrect assert in GL backend
  Fixes
diff: @@ -1719,9 +1719,8 @@ void OpenGLDriver::setTextureData(GLTexture* t,
  DEBUG_MARKER()
  auto& gl = mContext;
  - assert(xoffset + width <= t->width >> level);
  - assert(yoffset + height <= t->height >> level);
  - assert(zoffset + depth <= t->depth);
  + assert(xoffset + width <= std::max(1u, t->width >> level));
  + assert(yoffset + height <= std::max(1u, t->height >> level));
  assert(t->samples <= 1);
  if (UTILS_UNLIKELY(t->gl.target == GL_TEXTURE_EXTERNAL_OES)) {
  @@ -1752,6 +1751,7 @@ void OpenGLDriver::setTextureData(GLTexture* t,
  width, height, glFormat, glType, p.buffer);
  break;
  case SamplerType::SAMPLER_3D:
  + assert(zoffset + depth <= std::max(1u, t->depth >> level));
  bindTexture(OpenGLContext::MAX_TEXTURE_UNIT_COUNT - 1, t);
  gl.activeTexture(OpenGLContext::MAX_TEXTURE_UNIT_COUNT - 1);
  assert(t->gl.target == GL_TEXTURE_3D);
  @@ -1760,6 +1760,7 @@ void OpenGLDriver::setTextureData(GLTexture* t,
  width, height, depth, glFormat, glType, p.buffer);
  break;
  case SamplerType::SAMPLER_2D_ARRAY:
  + assert(zoffset + depth <= t->depth);
  // NOTE: GL_TEXTURE_2D_MULTISAMPLE is not allowed
  bindTexture(OpenGLContext::MAX_TEXTURE_UNIT_COUNT - 1, t);
  gl.activeTexture(OpenGLContext::MAX_TEXTURE_UNIT_COUNT - 1);
  