Restore checkpointed ledger under all paths in PathFind.

src/ripple_app/paths/RippleCalc.cpp

@@ -2819,6 +2819,13 @@ TER RippleCalc::rippleCalc (
         }
         else
         {
+            // We must restore the activeLedger from lesCheckpoint in the case
+            // when iBest is -1 and just before the result is set to tesSUCCESS.
+            // There was an issue when not on the first increment and there was
+            // no best path, where we did not restore the ledger to the last
+            // checkpoint.
+
+            activeLedger = lesCheckpoint.duplicate ();
             terResult   = tesSUCCESS;
         }
     }