Resolve ambiguity in OneElementMatrix * ZerosVector (#314)

Author: jishnub

src/oneelement.jl

@@ -84,6 +84,8 @@ function *(A::AbstractFillMatrix, x::OneElementVector)
 end
 *(A::AbstractZerosMatrix, x::OneElementVector) = mult_zeros(A, x)
 
+*(A::OneElementMatrix, x::AbstractZerosVector) = mult_zeros(A, x)
+
 function *(A::OneElementMatrix, B::AbstractFillVector)
     check_matmul_sizes(A, B)
     val = getindex_value(A) * getindex_value(B)

test/runtests.jl

@@ -2033,6 +2033,10 @@ end
                 @test O * v isa OneElement
                 @test O * v == Array(O) * Array(v)
             end
+
+            A = OneElement(2,(2,2),(5,4))
+            B = Zeros(4)
+            @test A * B === Zeros(5)
         end
     end