Fix build with gcc 15

--- a/src/queue.h
+++ b/src/queue.h
@@ -24,7 +24,7 @@
 
 void delete_queue_texbind( void );
 void create_queue_texbind( void );
-int create_queue();
+int create_queue(double (*rfunc)(double));
 void draw_queue( VMvect pos, GLfloat Xrot, GLfloat Zrot, GLfloat zoffs,
                  GLfloat xoffs, GLfloat yoffs, int spheretexbind, VMvect * lightpos, int lightnr );