[fix] Keep less then k_max distance paths

wotb/rusty.rs

@@ -260,13 +260,21 @@ impl WebOfTrust for RustyWebOfTrust {
             let mut new_paths = vec![];
 
             for path in &paths {
-                let sources = &graph[path.last().unwrap().0];
+                let node = path.last().unwrap();
+
+                if node == &to {
+                    // If path is complete, we keep it.
+                    new_paths.push(path.clone())
+                } else {
+                    // If not complete we comlete paths
+                    let sources = &graph[node.0];
                     for source in &sources.1 {
                         let mut new_path = path.clone();
                         new_path.push(NodeId(*source));
                         new_paths.push(new_path);
                     }
                 }                
+            }
 
             paths = new_paths;
         }