Reverting change that made path unpacking impossible

Contractor/BinaryHeap.h

@@ -184,6 +184,13 @@ public:
         return insertedNodes[removedIndex].node;
     }
 
+    void DeleteAll() {
+        for ( typename std::vector< HeapElement >::iterator i = heap.begin() + 1, iend = heap.end(); i != iend; ++i )
+            insertedNodes[i->index].key = 0;
+        heap.resize( 1 );
+        heap[0].weight = 0;
+    }
+
     void DecreaseKey( NodeID node, Weight weight ) {
         const Key index = nodeIndex[node];
         Key key = insertedNodes[index].key;

Contractor/ContractionCleanup.h

@@ -253,7 +253,7 @@ private:
         }
 
         if ( distance > *targetDistance ) {
-            heapForward->Clear();
+            heapForward->DeleteAll();
             return;
         }
         for ( int edge = _firstEdge[node], endEdges = _firstEdge[node + 1]; edge != endEdges; ++edge ) {

Contractor/SearchEngine.h

@@ -126,7 +126,7 @@ private:
             }
         }
         if ( distance > *_upperbound ) {
-            _forwardHeap->Clear();
+            _forwardHeap->DeleteAll();
             return;
         }
         for ( typename GraphT::EdgeIterator edge = _graph->BeginEdges( node ); edge < _graph->EndEdges(node); edge++ ) {
@@ -184,7 +184,7 @@ private:
             }
         }
 
-        assert(smallestWeight != SPECIAL_EDGEID);
+        assert(smallestWeight != SPECIAL_EDGEID); //no edge found. This should not happen at all!
 
         const EdgeData ed = _graph->GetEdgeData(smallestEdge);
         if(ed.shortcut)