Adam capturable kernel cast m/v to low bitwidth and cast back

[MaxwellDing]

TransformerEngine/transformer_engine/common/multi_tensor/adam.cu

Line 469 in 12af02f

m[i] = static_cast<T>(r_m[ii]);

Adam capturable kernel cast m/v to low bitwidth and cast back.
However, Adam capturable master kernel does not do this.
Is this a mistake or was it designed that way?

[timmoon10]

Thanks for the catch. This is a bug that is fixed with #1888.