ParCSRAAt for nonsquare matrices

[jesusbonilla]

I am trying to use ParCSRAAt with a rectangular matrix. Is there a reason for the following check or does it simply come from the standard matmul? Everything seems to be working on my end if I just remove it. Thanks! https://github.com/hypre-space/hypre/blob/ee74c20e7a84e4e48eec142c6bb6ff2a75db72f1/src/parcsr_mv/par_csr_aat.c#L392