Build fix, use -Os on Linux too.

osdep/Binder.hpp

@@ -57,6 +57,7 @@
 #include <algorithm>
 #include <utility>
 #include <map>
+#include <set>
 
 #include "../node/NonCopyable.hpp"
 #include "../node/InetAddress.hpp"
@@ -471,6 +472,20 @@ Binder_send_packet:
 		return aa;
 	}
 
+	/**
+	 * @param addr Address to check
+	 * @return True if this is a bound local interface address
+	 */
+	inline bool isBoundLocalInterfaceAddress(const InetAddress &addr) const
+	{
+		Mutex::Lock _l(_lock);
+		for(std::vector<_Binding>::const_iterator b(_bindings.begin());b!=_bindings.end();++b) {
+			if (b->address == addr)
+				return true;
+		}
+		return false;
+	}
+
 private:
 	std::vector<_Binding> _bindings;
 	Mutex _lock;