Correcting skip of dilution step.

src/stcal/saturation/saturation.py

@@ -127,20 +127,21 @@ def flag_saturated_pixels(
             nextdq = gdq[ints, group + 1, :, :]
 
             # Determine the dilution factor due to group averaging
+
+            # No point in this step if the dilution factor is 1.  In
+            # that case, there is no way that we would have missed
+            # saturation before but flag it now, since the threshold
+            # would be the same.
+
             if read_pattern is not None:
                 # Single value dilution factor for this group
                 dilution_factor = np.mean(read_pattern[group]) / read_pattern[group][-1]
+                if dilution_factor == 1:
+                    continue
                 # Broadcast to array size
                 dilution_factor = np.where(no_sat_check_mask, 1, dilution_factor)
             else:
                 dilution_factor = 1
-
-            # No point in this step if the dilution factor is 1.  In
-            # that case, there is no way that we would have missed
-            # saturation before but flag it now, since the threshold
-            # would be the same.
-
-            if dilution_factor == 1:
                 continue
 
             # Find where this plane looks like it might saturate given