exit before writing last bin

shared/libebm/PartitionOneDimensionalBoosting.cpp

@@ -272,7 +272,8 @@ static ErrorEbm Flatten(BoosterShell* const pBoosterShell,
                   EBM_ASSERT(0 != prev);
                   if(cBins + 1 == iEdge && cBins == prev) {
                      // this cut would isolate the missing bin, but we handle those scores separately
-                     break;
+                     pInnerTermUpdate->SetCountSlices(iDimension, 1);
+                     return Error_None;
                   }
                }
             }