Adapt jdraw synoptic to python 3.10
Deprecate implicit truncating when convert Python numbers to C integers: use index, not int has been added in Python 3.8 and is enforced in 3.10. This makes the jdraw code fail. Adapt the code to explicitly use integers.
I tested with example01 and apparently work:
╰─>$ python -m taurus.qt.qtgui.graphic.jdraw.jdraw_view lib/taurus/qt/qtgui/taurusgui/conf/tgconf_example01/images/example01.jdw