squash a -Wimplicit-fallthrough warning

diff --git a/lib/sparse/SparseMatrix.c b/lib/sparse/SparseMatrix.c
index c9e384296227c2267da2d742fd61335ce2dc15a5..312641bf935181e7abc5902728ee4c88eac15c9f 100644 (file)
--- a/lib/sparse/SparseMatrix.c
+++ b/lib/sparse/SparseMatrix.c
@@ -1366,6 +1366,7 @@ SparseMatrix SparseMatrix_multiply_by_scaler(SparseMatrix A, real s){
     FREE(A->a);
     A->a = b;
     A->type = MATRIX_TYPE_REAL;
+    // fall through
   case MATRIX_TYPE_REAL:
     a = (real*) A->a;
     ia = A->ia;