Fix erasing of premove highlights XB
authorH.G.Muller <hgm@hgm-xboard.(none)>
Tue, 29 Mar 2016 14:30:50 +0000 (16:30 +0200)
committerH.G.Muller <hgm@hgm-xboard.(none)>
Tue, 29 Mar 2016 14:51:35 +0000 (16:51 +0200)
commit95244a1c40718e9ad8bda9e2df66677e180354d6
treed4e63d01467a772e7a30c7a8a0e6cc0b8c1c68f5
parent1b496db1341c1bb594c62c3059433d963d6a3888
Fix erasing of premove highlights XB

The to-square premove highlight was not marked for erasure (but
the from-square was marked twice if the to-square higlight  changed),
leading to accumulation of highlighted squares during PV walking.
board.c