Fixed return code handling

.bin/Scripts/build-ufd

@@ -42,6 +42,7 @@ def get_user_name():
 
 # Main section
 if __name__ == '__main__':
+  return_code = 0
   # Set log
   try:
     global_vars['LogDir'] = '{}/Logs'.format(
@@ -169,10 +170,11 @@ if __name__ == '__main__':
       print_standard('\nDone.')
       pause('Press Enter to exit...')
     exit_script()
-  except SystemExit:
-    pass
+  except SystemExit as e:
+    return_code = e.code
   except:
     major_exception()
 
+  exit_script(return_code)
 
 # vim: sts=2 sw=2 ts=2