fix corridor param check

csaxs_bec/bec_ipython_client/plugins/flomni/flomni.py

@@ -2120,7 +2120,7 @@ class Flomni(
                     f" number {bec.queue.next_scan_number}.\n"
                 )
 
-                scans.flomni_fermat_scan(
+                scan_kwargs = dict(
                     fovx=self.fovx,
                     fovy=self.fovy,
                     step=self.tomo_shellstep,
@@ -2129,9 +2129,13 @@ class Flomni(
                     zshift=sum_offset_z,
                     angle=angle,
                     exp_time=self.tomo_countingtime,
-                    corridor_size=corridor_size,
                 )
 
+                if self.corridor_size > 0:
+                    scan_kwargs["corridor_size"] = self.corridor_size
+
+                scans.flomni_fermat_scan(**scan_kwargs)
+
         self.tomo_reconstruct()