Add abspath for stardist finding

src/bactos_functions.py

@@ -936,9 +936,8 @@ def run_processing(data_list, nom_sortie, MM_version=2, background='auto',
             test_paths += [stardist_path]
 
         for p in test_paths:
-            if os.path.exists(p):
+            if os.path.exists(os.path.abspath(p)):
                 startdist_path = p
-                break
 
         print(f'Stardist folder: {stardist_path}')