message: Fix crash on GL after saving a texture to disk, wrong thread access
diff: @@ -3480,7 +3480,13 @@ void TextureViewer::on_saveTex_clicked()
  m_SaveConfig.resourceId = id;
  }
  - const ResourceId overlayTexID = m_Output->GetDebugOverlayTexID();
  + ResourceId overlayTexID;
  + if(m_TexDisplay.overlay != DebugOverlay::NoOverlay)
  + {
  + m_Ctx.Replay().BlockInvoke([this, &overlayTexID](IReplayController *r) {
  + overlayTexID = m_Output->GetDebugOverlayTexID();
  + });
  + }
  const bool hasSelectedOverlay = (m_TexDisplay.overlay != DebugOverlay::NoOverlay);
  const bool hasOverlay = (hasSelectedOverlay && overlayTexID != ResourceId());
  TextureSaveDialog saveDialog(*texptr, hasOverlay, m_SaveConfig, this);
  