diff --git a/doxygen/images/gui.png b/doxygen/images/gui.png
index 07ac90a..ae3a854 100644
Binary files a/doxygen/images/gui.png and b/doxygen/images/gui.png differ
diff --git a/gds-utils/gds-parser.c b/gds-utils/gds-parser.c
index ccf1b3d..77b6923 100644
--- a/gds-utils/gds-parser.c
+++ b/gds-utils/gds-parser.c
@@ -575,7 +575,7 @@ static void convert_aref_to_sref(struct gds_cell_array_instance *aref, struct gd
 	struct gds_point origin;
 	struct gds_point row_shift_vector;
 	struct gds_point col_shift_vector;
-	struct gds_cell_instance *sref_inst;
+	struct gds_cell_instance *sref_inst = NULL;
 	int col;
 	int row;