matmul! does not size-check

[jaakkor2]

using Octavian
n,m=100,10
y, A, x = rand(n), rand(n,m), rand(m+1)
matmul!(y,A,x)

whereas

using LinearAlgebra
n,m=100,10
y, A, x = rand(n), rand(n,m), rand(m+1)
mul!(y,A,x)

errors ERROR: DimensionMismatch("second dimension of A, 10, does not match length of x, 11")

Octavian v0.3.1