After Effects 26.4 SDK Regression: AEGP_GetEffectLayer() no longer returns valid handle when invoked during PF_Cmd_PARAMS_SETUP

As first discovered in After Effects 26.3, third-party plugins based on the AE SDK can no longer expect to receive a valid AEGP_LayerH via AEGP_PFInterfaceSuite1->AEGP_GetEffectLayer() if the call is made while the plug-in is handling the PF_Cmd_PARAMS_SETUP command.

It is unclear how this affects all third-party plugins running in AE. The side effects for FxFactory plug-ins thankfully appear to be marginal. Our plugins are invoking that function during PF_Cmd_PARAMS_SETUP in order to compute the in/out points of the effect clip by using the AEGP_LayerH in subsequent calls to AEGP_LayerSuite7->AEGP_GetLayerInPoint() and AEGP_LayerSuite7->AEGP_GetLayerDuration().