Related to #562, this seems like a bug: ``` r R> cppFunction("NumericMatrix testmat(int n, double fillme) { NumericMatrix M(n, n); M = fillme; return M; }") R> testmat(2L, 3) [,1] [,2] [,3] [1,] 0 0 0 [2,] 0 0 0 [3,] 0 0 0 R> ``` I was expecting a 2x2 matrix will with the value 3. No mas.