Fix size on GenericMemory with non-Int Integer argument (#53161)

I found this through fuzzing. The nature of the issue indicates to me
that this was untested, but coverage doesn't seem to have run for the
past three months so I can't check, which is why I added an explicit
test.

I'm not sure `arrayops.jl` is the best place for tests related to
`GenericMemory`, so feel free to suggest a better one.

Co-authored-by: Sukera <Seelengrab@users.noreply.github.com>

Author: Seelengrab

base/genericmemory.jl

@@ -23,7 +23,7 @@ size(a::GenericMemory, d::Int) =
     d < 1 ? error("dimension out of range") :
     d == 1 ? length(a) :
     1
-size(a::GenericMemory, d::Integer) =  size(a, convert(d, Int))
+size(a::GenericMemory, d::Integer) =  size(a, convert(Int, d))
 size(a::GenericMemory) = (length(a),)
 
 IndexStyle(::Type{<:GenericMemory}) = IndexLinear()

test/arrayops.jl

@@ -3192,3 +3192,12 @@ end
     @test_throws DimensionMismatch wrap(Array, memref2, 9)
     @test_throws DimensionMismatch wrap(Array, memref2, 10)
 end
+
+@testset "Memory size" begin
+    len = 5
+    mem = Memory{Int}(undef, len)
+    @test size(mem, 1) == len
+    @test size(mem, 0x1) == len
+    @test size(mem, 2) == 1
+    @test size(mem, 0x2) == 1
+end