Fix invocation of the image cat script as kitty icat

__main__.py

@@ -7,7 +7,7 @@ sys.debug_gl = '--debug-kitty-gl' in sys.argv
 
 if len(sys.argv) > 1 and sys.argv[1] == 'icat':
     from kitty.icat import main
-    main()
+    main(sys.argv[1:])
 else:
     from kitty.main import main
     main()