Fixed call to retrieve the camera geometry (now global to event source and not...

Fixed call to retrieve the camera geometry (now global to event source and not attached to each event).

hillas_preprocessing.py

@@ -232,7 +232,7 @@ def process_dataset_mc(input_mask, output_name, image_cleaning_settings):
                     # Pixel arrival time map
                     event_pulse_time = event.dl1.tel[tel_id].pulse_time
                     # Camera geometry
-                    camera = event.inst.subarray.tel[tel_id].camera
+                    camera = source.subarray.tel[tel_id].camera
 
                     # ---------------------------
                     # Computing the cleaning mask
@@ -370,7 +370,7 @@ def process_dataset_data(input_mask, tel_id, output_name, image_cleaning_setting
                 # Pixel arrival time map
                 event_pulse_time = event.dl1.tel[tel_id].pulse_time
                 # Camera geometry
-                camera = event.inst.subarray.tel[tel_id].camera
+                camera = source.subarray.tel[tel_id].camera
 
                 # ---------------------------
                 # Computing the cleaning mask