Fix spurious promotion partners
authorH.G.Muller <hgm@hgm-xboard.(none)>
Sat, 6 Feb 2016 09:21:21 +0000 (10:21 +0100)
committerH.G.Muller <hgm@hgm-xboard.(none)>
Sat, 6 Feb 2016 09:21:21 +0000 (10:21 +0100)
commit59b7ace7dd899298869a0921c0b9137e233c196b
tree356d6d64f7febc7369d2f96946396d8bcbd811dd
parent05d93abc18cc51e4e562b37273cd91e32b175017
Fix spurious promotion partners

When defining a new promotion pairing through ^L the default partners
of L and +L must be made partnerless, or they would still promote to +L
or demote to L.
backend.c