Do something half-way sane (no SIGSEGV) when there are no dives

It just leaves ugly blank areas, but whatever.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 9 insertions, 2 deletions

diff --git a/info.c b/info.c
index efd17f896..bef3f1dba 100644
--- a/info.c
+++ b/info.c
@@ -12,6 +12,13 @@ void update_dive_info(struct dive *dive)
 	struct tm *tm;
 	char buffer[80];
 
+	if (!dive) {
+		gtk_entry_set_text(GTK_ENTRY(datetime), "no dive");
+		gtk_entry_set_text(GTK_ENTRY(depth), "");
+		gtk_entry_set_text(GTK_ENTRY(duration), "");
+		return;
+	}
+
 	tm = gmtime(&dive->when);
 	snprintf(buffer, sizeof(buffer),
 		"%04d-%02d-%02d "
diff --git a/profile.c b/profile.c
index f898be745..9d84ff29d 100644
--- a/profile.c
+++ b/profile.c
@@ -100,7 +100,7 @@ static void plot(cairo_t *cr, int w, int h, struct dive *dive, int samples, stru
 
 static gboolean expose_event(GtkWidget *widget, GdkEventExpose *event, gpointer data)
 {
-	struct dive *dive = dive_table.dives[selected_dive];
+	struct dive *dive = current_dive;
 	cairo_t *cr;
 	int w,h;
 
@@ -111,7 +111,7 @@ static gboolean expose_event(GtkWidget *widget, GdkEventExpose *event, gpointer
 	cairo_set_source_rgb(cr, 0, 0, 0);
 	cairo_paint(cr);
 
-	if (dive->samples)
+	if (dive && dive->samples)
 		plot(cr, w, h, dive, dive->samples, dive->sample);
 
 	cairo_destroy(cr);