task.py: use DIR_FUSE as default DIR for pre_process script

server/web2py/applications/vidjil/models/task.py

@@ -658,7 +658,7 @@ def run_pre_process(pre_process_id, sequence_file_id, clean_before=True, clean_a
     sys.stdout.flush()
     log_file = open(out_folder+'/'+output_filename+'.pre.log', 'w')
     
-    
+    os.chdir(defs.DIR_FUSE)
     p = Popen(cmd, shell=True, stdin=PIPE, stdout=log_file, stderr=log_file, close_fds=True)
     (stdoutdata, stderrdata) = p.communicate()
     print "Output log in "+out_folder+'/'+output_filename+'.pre.log'