Handle leak inside psutil_get_process_data

[xbeastx]

https://github.com/giampaolo/psutil/blob/master/psutil/arch/windows/process_info.c#L436
Here is open process:

hProcess = psutil_handle_from_pid(pid);

and if all actions was succesful process handle not closing https://github.com/giampaolo/psutil/blob/master/psutil/arch/windows/process_info.c#L668

    *pdata = buffer;
    *psize = size;

    return 0;

error:
    if (hProcess != NULL)
        CloseHandle(hProcess);
    if (buffer != NULL)
        free(buffer);
    return -1;
}

Only if errors occured.

[giampaolo]

Good catch. Up for making a PR? =)

[giampaolo]

Fixed in #871.