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Clang16 does not allow implicit function declarations by default.
See also: https://wiki.gentoo.org/wiki/Modern_C_porting
Bug: https://bugs.gentoo.org/875764
Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>
--- a/src/main.c
+++ b/src/main.c
@@ -49,6 +49,9 @@ GList* edge_list = NULL;
MouseState mouse_state = IDLE;
Vertex last_click;
+/* Function prototypes */
+gboolean redraw_render_area( GtkWidget* widget, GdkEventExpose* event, gpointer user_data );
+
/* Functionality and callback functions */
void clear_edge_list()
{
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