mpl: fix array mis-initialization
mpl: fix array mis-initialization

This code is wrong:
     macro_weights_[i].resize(weight_size);
     macro_weights_[i] = {0};

I guess the second line in a misguided attempt at initialization.  The values
are all allready initialized by resize.  The assignment to {0} replaces
the resized array with one of size 1 thereby undoing the resize.

Signed-off-by: Matt Liberty <44ef1ce0ef6935daf739a0795dad249ba5322e97@eng.ucsd.edu>

The-OpenROAD-Project/OpenROAD,The-OpenROAD-Project/OpenROAD,The-OpenROAD-Project/OpenROAD,QuantamHD/OpenROAD,The-OpenROAD-Project/OpenROAD,QuantamHD/OpenROAD,The-OpenROAD-Project/OpenROAD,QuantamHD/OpenROAD,QuantamHD/OpenROAD,QuantamHD/OpenROAD