FuseNode, Handle is not checked on c++ side

[NickKhalow]

Issue Description:

hMmfOutput is not checked that may lead to memory miss writes and cause crash of the program. It's not critical because FuseNode is designed to be killed when it reaches memory limit and FuseNode is autolaunched on the managed side.

FuseNode\main.cpp

    printf("Opening files\n");
    HANDLE hMmfInput = OpenFileMapping(FILE_MAP_READ, FALSE, InputFileAddress);
    if (!hMmfInput)
    {
        fprintf(stderr, "Error on opening input file: %d", GetLastError());
        return 1;
    }

    HANDLE hMmfOutput = OpenFileMapping(FILE_MAP_WRITE, FALSE, OutputFileAddress);
    if (!hMmfInput)
    {
        fprintf(stderr, "Error on opening input file: %d", GetLastError());
        return 1;
    }
    printf("Files are opened successfully\n");