Fixes bug where we run out of closest port.

galaxy.cpp

@@ -545,6 +545,8 @@ port_pair_type Galaxy::find_closest(int sector) {
   std::set<sector_type> current;
   current.insert(sector);
   bool found = false;
+  bool added_new = false;
+  int depth = 0;
 
   while (!found) {
     // is current list in any of the trades ?
@@ -558,6 +560,10 @@ port_pair_type Galaxy::find_closest(int sector) {
         return t;
       }
     }
+    
+    ++depth;
+    BUGZ_LOG(info) << "depth: " << depth << " current:" << current.size() << " seen: " << seen.size();
+    added_new = false;
 
     if (!found) {
       // update the seen
@@ -578,10 +584,17 @@ port_pair_type Galaxy::find_closest(int sector) {
                 warp_back->second.warps.end()) {
               // Ok, this links back to the original sector...
               current.insert(w);
+              added_new = true;
             }
           }
         }
       }
+      if (! added_new) {
+        BUGZ_LOG(warning) << "No new sectors added.  We're done!";
+        port_pair_type ppt;
+        ppt.type = 0;
+        return ppt;
+      }
     }
   }
   port_pair_type ppt;