Check if we are running within 32-bit python prior execution.

[tahadraidia]

In case of a misconfigured working environment, executing the script using Python 64-bit will raise OSError: exception: access violation writing when invoking RtlMoveMemory() API.

...
[+] Debugging shellcode ...
Traceback (most recent call last):
  File "C:\Users\tahai\code\osed-scripts\shellcoder.py", line 670, in <module>
    main(args)
  File "C:\Users\tahai\code\osed-scripts\shellcoder.py", line 597, in main
    ctypes.windll.kernel32.RtlMoveMemory(
OSError: exception: access violation writing 0x00000000E3030000

As a quick workaround we can add a check if test_shellcode parameter is set.

[epi052]

Thanks for the PR! No issues for me here, merging.