isl_dim_total: handle NULL input

Signed-off-by: Sven Verdoolaege <skimo@kotnet.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/isl_dim.c b/isl_dim.c
index 1fb7c446..b692188d 100644
--- a/isl_dim.c
+++ b/isl_dim.c
@@ -957,7 +957,7 @@ struct isl_dim *isl_dim_underlying(struct isl_dim *dim, unsigned n_div)
 
 unsigned isl_dim_total(struct isl_dim *dim)
 {
-	return dim->nparam + dim->n_in + dim->n_out;
+	return dim ? dim->nparam + dim->n_in + dim->n_out : 0;
 }
 
 int isl_dim_equal(struct isl_dim *dim1, struct isl_dim *dim2)