Avoid doing strdup(NULL)

1 files changed, 5 insertions, 1 deletions

diff --git a/src/detector.c b/src/detector.c
index 4d60f66e..5c1db570 100644
--- a/src/detector.c
+++ b/src/detector.c
@@ -782,7 +782,11 @@ struct detector *copy_geom(const struct detector *in)
 	out = malloc(sizeof(struct detector));
 	memcpy(out, in, sizeof(struct detector));
 
-	out->mask = strdup(in->mask);
+	if ( in->mask != NULL ) {
+		out->mask = strdup(in->mask);
+	} else {
+		out->mask = NULL;  /* = in->mask */
+	}
 
 	out->panels = malloc(out->n_panels * sizeof(struct panel));
 	memcpy(out->panels, in->panels, out->n_panels * sizeof(struct panel));