Fixed little bug in export_to_sigui

Fixed a bug where params `{}` would not run the PCA or spike amplitudes.

src/lussac/modules/export_to_sigui.py

@@ -34,9 +34,9 @@ def run(self, params: dict[str, Any]) -> si.BaseSorting:
 		path = self._format_output_path(params['path'])
 		wvf_extractor = si.extract_waveforms(self.recording, self.sorting, path, **params['wvf_extraction'])
 
-		if params['spike_amplitudes']:
+		if isinstance(params['spike_amplitudes'], dict):
 			spost.compute_spike_amplitudes(wvf_extractor, **params['spike_amplitudes'])
-		if params['principal_components']:
+		if isinstance(params['principal_components'], dict):
 			spost.compute_principal_components(wvf_extractor, **params['principal_components'])
 
 		return self.sorting

src/lussac/modules/merge_sortings.py

@@ -20,6 +20,8 @@ class MergeSortings(MultiSortingsModule):
 	Merges the sortings into a single one.
 	"""
 
+	aggregated_wvf_extractor: si.WaveformExtractor  # Waveform extractor for all analyses.
+
 	@property
 	@override
 	def default_params(self) -> dict[str, Any]: