Fix Segmentation fault when trying to print an empty plot.

When printing an empty plot, the function was missing nullability check for 'current_dive'. Now the print of an empty plot results with an empty blank page.
A better solution could be making unsensitive the Print entry in the menu, until a plot is loaded.

Signed-off-by: Riccardo Albertini <ssirowain@gmail.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/print.c b/print.c
index 0fe958a00..57cac8075 100644
--- a/print.c
+++ b/print.c
@@ -22,7 +22,8 @@ static void draw_page(GtkPrintOperation *operation,
 	h = gtk_print_context_get_height(context);
 
 	/* Do the profile on the top half of the page.. */
-	plot(&gc, w, h/2, current_dive);
+	if (current_dive)
+		plot(&gc, w, h/2, current_dive);
 
 	pango_cairo_show_layout(cr,layout);
 	g_object_unref(layout);