DEBUG flags cleanup, some dead code removal

lceb.h

@@ -65,6 +65,13 @@ typedef struct best {
     struct timespec timer;
 } BEST;
 
+/* lceb.c */
+extern void print_results();
+
+/* signal.c */
+extern void set_intr();
+extern int stopped();
+
 /* tree.c */
 extern NODE *get_node();
 extern void free_node(NODE *node);
@@ -119,7 +126,6 @@ extern int get_totnodes();
 extern int get_totleaves();
 
 /* best.c */
-extern int stopped();
 extern void set_target (int n);
 extern int check_best(int res, int nops, NODE *node, int *values, char *ops);
 extern void print_best(NODE *node, int *values, char *pops, int depth);