#1394 / win / exe: use QueryFullProcessImageNameW to get the exe()

[giampaolo]

See #1394.

[giampaolo]

As said in #1394 (comment) this has the drawback of breaking backward compatibility on Win XP. I'm not sure how much time I'm willing to invest into this but roughly I see one solution:

1. use C pre-processor in order to identify the Windows version and choose the right code path:

#if (_WIN32_WINNT >= 0x0600) // Windows Vista and above
   // new code using QueryFullProcessImageNameW
#else // Windows XP
    // old code using GetProcessImageFileNameW
#endif

2. implement a similar routine in the python code so that if WINVER < VISTA we use QueryDosDevice to convert the returned path in the right format

[giampaolo]

@ogurets if I land a patch including Win XP support could you please try? (I have no Win XP box to test against)

[ogurets]

@giampaolo Sure! Cannot promise I'll be swift though, I'm pretty piled up right now :(

[giampaolo]

No rush. In general terms this is low-priority anyway so I'll forget about it unless pinged here (I was tempted to remove Win XP support, but sort of felt a bit cautious... =)).