for the ally prompts to player bolts.
git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@10547 c06c8d41-db1a-0410-9941-cceddc491573
EJM4KGCEPHK7NVOZDWXJTECUCWFFTNSB5VYQS2HECLD3LPFXS4JAC
LZN527GR3AULRHWIBA537RR4WSCNNYY4XSEZ6VFF7TKGYSUSBOCAC
K2CS6TCX2NDVL2ASEHGP4J4K4IJ6FP3ANNKTSIWVG43HPYSBX6ZQC
if (is_tracer && used == BEAM_STOP)
if (is_tracer && beam_source == NON_MONSTER && used == BEAM_STOP)