fix #629 (#630)

* fix #629

* test `dot(::SMatrix, ::SMatrix)`

Author: simeonschaub

src/linalg.jl

@@ -214,7 +214,7 @@ end
     @inbounds return similar_type(a, typeof(Signed(a[2]*b[3])-Signed(a[3]*b[2])))(((Signed(a[2]*b[3])-Signed(a[3]*b[2]), Signed(a[3]*b[1])-Signed(a[1]*b[3]), Signed(a[1]*b[2])-Signed(a[2]*b[1]))))
 end
 
-@inline dot(a::StaticVector, b::StaticVector) = _vecdot(same_size(a, b), a, b, dot)
+@inline dot(a::StaticArray, b::StaticArray) = _vecdot(same_size(a, b), a, b, dot)
 @inline bilinear_vecdot(a::StaticArray, b::StaticArray) = _vecdot(same_size(a, b), a, b, *)
 
 @inline function _vecdot(::Size{S}, a::StaticArray, b::StaticArray, product) where {S}

test/linalg.jl

@@ -120,6 +120,9 @@ using StaticArrays, Test, LinearAlgebra
         @test @inferred(dot(@SVector[[1,2],[3,4]], @SVector[[1,2],[3,4]])) === 30
         @test @inferred(@SVector[[1,2],[3,4]]' * @SVector[[1,2],[3,4]]) === 30
 
+        m1 = reshape(v1, Size(2,2))
+        m2 = reshape(v2, Size(2,2))
+        @test @inferred(dot(m1, m2)) === dot(v1, v2)
     end
 
     @testset "transpose() and conj()" begin