mmhash128_4(::Integer, ::Unsigned, ::UInt32) is missing (breaks 32bit)

[oxinabox]

I am using ShortString.jl on a 32 bit system.
On a 32 bit system mmhash128_a is mmhash128_4
which is used here:
https://github.com/JuliaString/ShortStrings.jl/blob/fcacbe7e596f0a2544c3a62ab3500775dbcf139c/src/hash.jl#L3-L6

I get this error from hashing a ShortString:

  LoadError: MethodError: no method matching unsafe_load(::UInt32)
  Closest candidates are:
    unsafe_load(!Matched::Ptr) at pointer.jl:105
    unsafe_load(!Matched::Ptr, !Matched::Integer) at pointer.jl:105
  Stacktrace:
   [1] mmhash128_4(::Int32, ::UInt32, ::UInt32) at depot/packages/MurmurHash3/rOsVB/src/MurmurHash3.jl:408
   [2] hash at depot/packages/ShortStrings/j6S0g/src/ShortStrings.jl:16 [inlined]

The code that is hit is :.
Note that we are passing in a UInt rather than a Ptr

MurmurHash3.jl/src/MurmurHash3.jl

Lines 405 to 418 in a7beaab

	function mmhash128_4(len, pnt, seed::UInt32)
	pnt, h1, h2, h3, h4 = mhbody(len >>> 4, pnt, seed, seed, seed, seed)
	if (left = len & 15) != 0
	h1 = xor(h1, rotl16(unsafe_load(pnt) * e1) * e2)
	if left > 4
	h2 = xor(h2, rotl16(unsafe_load(pnt+4) * e2) * e3)
	if left > 8
	h3 = xor(h3, rotl17(unsafe_load(pnt+8) * e3) * e4)
	left > 12 && (h4 = xor(h4, rotl18(unsafe_load(pnt+12) * e4) * e1))
	end
	end
	end
	mhfin(len, h1, h2, h3, h4)
	end

I think the problem is that a method is missing.
On a 64 bit system mmhash128_8_a is hit, and it has an overload that takes an Unsigned

MurmurHash3.jl/src/MurmurHash3.jl

Lines 123 to 124 in a7beaab

	mmhash128_8_a(len::Integer, val::Unsigned, seed::UInt32) =
	len === 0 ? mhfin(seed) : _mmhash128(len, val, seed)

[ScottPJones]

OK! When I was adapting MurmurHash3 to make ShortString efficient, it looks like I missed that 32-bit case!
I'll try to fix this weekend

[oxinabox]

bump

[ScottPJones]

Fixed by PR #13