More windows compatible compiling

[MaxvandenBoom]

Hi Jan and Dan,

I was using and compiling meflib in Visual Studio directly (so not compiling via matlab this time), and Visual studio comes up with two errors before you can compile. I though I would share the fixes, so others don't have to handle these errors before being able to use the library.

The first error that I got came from the use of fileno (on line 3731). This has been deprecated for windows (https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/posix-fileno?view=vs-2019). I understand for UNIX this is the standard so I changed the precompiler to differentiate: fileno for unix, _fileno for windows

The second error that the compiler gives is potentially uninitialized local pointer variable 'key' used (on line 6620). If I follow the logic of the program, it currently should not reach that line if indeed key is not set; but the compiler gives an error because hypothetically encryption_level could get a value higher than 2 (LEVEL_2_ENCRYPTION) which would cause it to indeed use key as a uninitialized local pointer. I fixed it by added a NULL initialization for key to the existing else that precedes it.

After these fixes, it will compile in Visual Studio. Hope this helps others!

[cimbi]

Hi @MaxvandenBoom, thanks. I'll review this during the weekend and merge.

[MaxvandenBoom]

Thanks!