  It has been shown recently shown that the values of $J_T$ and $J_L$ which
appear in Eq.(2) and (5) of the above paper and which are taken from the work
of Aurenche et al are too large by a factor of 4. Correcting for this changes
the Fig.~1--4. The basic result of the paper, that the emissions from the quark
matter can outshine those from the hadronic matter when the photon rates upto
two-loop level are used, remains valid though the range of $p_T$ over which it
happens is reduced to $p_T <$ 0.5, 1, and 2 GeV/$c$ respecitively at SPS, RHIC,
and LHC energies.
