Fix breakpoint cloning
diff --git a/common.h b/common.h
index eef3769..5c7ba09 100644
--- a/common.h
+++ b/common.h
@@ -235,6 +235,7 @@
 
 int arch_breakpoint_init(struct Process *proc, struct breakpoint *sbp);
 void arch_breakpoint_destroy(struct breakpoint *sbp);
+int arch_breakpoint_clone(struct breakpoint *retp, struct breakpoint *sbp);
 
 typedef void *target_address_t;
 /* This should extract entry point address and interpreter (dynamic