[blitz.mod] Expose MemSet() or extend MemClear() to allow specific values

[GWRon]

The current implementation of MemClear() is

blitz.mod/blitz.bmx

Rem
bbdoc: Clear a block of memory to 0
End Rem
Function MemClear( mem:Byte Ptr,size:Size_T )="void bbMemClear( void *,size_t )"

blitz.mod/blitz_memory.c:

void bbMemClear( void *dst,size_t size ){
	memset( dst,0,size );
}

In other words it internally already uses "MemSet()" but with a fixed byte value of 0.

I would kindly request to expose "MemSet" too (so bbMemSet or so).
As this is only for "bytes" ("char") I think we would need (most often) a 32bit version too ... or also 64bit?
Inside of BlitzMax we could expose it overloaded

MemSet(mem:Byte Ptr, value:Byte, size:Size_T)
MemSet(mem:Byte Ptr, value:Int, size:Size_T)
MemSet(mem:Byte Ptr, value:Long, size:Size_T)

but would need to care for "left over" bytes (a size which is not a multiple of the value size)
(for now I would prefer a "if it does not fit into anymore, keep it untouched")

Approaches:
https://stackoverflow.com/questions/108866/is-there-memset-that-accepts-integers-larger-than-char

The idea is to allow speeding up eg. "writepixel"-blocks in TPixmap objects.
https://www.syntaxbomb.com/blitzmax-blitzmax-ng/faster-pixmap/new/#new