Can't use emul on (X, 1) GBMatrix and GBVector as parameters

[andreyz4k]

It's quite uncomfortable since extracting A[:, i] outputs a matrix, but reduce with fixed dims outputs a vector. It's possible to transpose a vector to transform it into a matrix, but requires additional operation

julia> B = GBVector([1, 2, 3, 4, 5, 6, 7], [1, 2, 3, 4, 5, 6, 7])
7x1 GraphBLAS int64_t matrix, full by col
  7 entries, memory: 264 bytes

    (1,1)   1
    (2,1)   2
    (3,1)   3
    (4,1)   4
    (5,1)   5
    (6,1)   6
    (7,1)   7


julia> A = GBMatrix([1,1,2,2,3,4,4,5,6,7,7,7], [2,4,5,7,6,1,3,6,3,3,4,5], [1:12...])
7x7 GraphBLAS int64_t matrix, bitmap by row
  12 entries, memory: 649 bytes

    (1,2)   1
    (1,4)   2
    (2,5)   3
    (2,7)   4
    (3,6)   5
    (4,1)   6
    (4,3)   7
    (5,6)   8
    (6,3)   9
    (7,3)   10
    (7,4)   11
    (7,5)   12


julia> A[:, 2]
7x1 GraphBLAS int64_t matrix, bitmap by col
  1 entry, memory: 272 bytes

    (1,1)   1


julia> emul(A[:, 2], B)
ERROR: DimensionMismatch("")
Stacktrace:
 [1] emul!(C::GBMatrix{Int64, Nothing}, A::GBMatrix{Int64, Nothing}, B::GBVector{Int64, Nothing}, op::Function; mask::Nothing, accum::Nothing, desc::Nothing)
   @ SuiteSparseGraphBLAS ~/.julia/packages/SuiteSparseGraphBLAS/5AOj3/src/operations/ewise.jl:35
 [2] emul(A::GBMatrix{Int64, Nothing}, B::GBVector{Int64, Nothing}, op::Function; mask::Nothing, accum::Nothing, desc::Nothing)
   @ SuiteSparseGraphBLAS ~/.julia/packages/SuiteSparseGraphBLAS/5AOj3/src/operations/ewise.jl:80
 [3] emul(A::GBMatrix{Int64, Nothing}, B::GBVector{Int64, Nothing}, op::Function) (repeats 2 times)
   @ SuiteSparseGraphBLAS ~/.julia/packages/SuiteSparseGraphBLAS/5AOj3/src/operations/ewise.jl:78
 [4] top-level scope
   @ REPL[58]:1

julia> emul(A[:, 2]', B')
1x7 GraphBLAS int64_t matrix, bitmap by row
  1 entry, memory: 272 bytes

    (1,1)   1