Ensure all table values are floats

Author: jluethi

fractal_tasks_core/tasks/projection.py

@@ -119,8 +119,8 @@ def projection(
 
         roi_list = []
         for roi in table.rois:
-            roi.z = 0
-            roi.z_length = 1
+            roi.z = 0.0
+            roi.z_length = 1.0
             roi_list.append(roi)
 
         mip_table.set_rois(roi_list, overwrite=True)