minor optimisation

2023-10-06 13:19:22 +10:00
parent a6e1189470
commit 1ec8ff7464
1 changed files with 2 additions and 0 deletions
@@ -2657,6 +2657,8 @@ Mat<eT>::operator=(const SpBase<eT, T1>& m)
  
  (*this).zeros(x.n_rows, x_n_cols);
  
+  if(x.n_nonzero == 0)  { return *this; }
+  
  const    eT* x_values      = x.values;
  const uword* x_row_indices = x.row_indices;
  const uword* x_col_ptrs    = x.col_ptrs;