exit before last cut (and also last bin)

shared/libebm/PartitionOneDimensionalBoosting.cpp

@@ -372,7 +372,8 @@ static ErrorEbm Flatten(BoosterShell* const pBoosterShell,
                            EBM_ASSERT(iEdge <= cBins);
                            if(cBins == iEdge) {
                               // this cut would isolate the missing bin, but missing already has a cut
-                              break;
+                              pInnerTermUpdate->SetCountSlices(iDimension, 1);
+                              return Error_None;
                            }
                         }
                      }