only enemy monsters are around.
git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@6210 c06c8d41-db1a-0410-9941-cceddc491573
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2AZDBJ4WJ3RB2XPEQMY37YZTHYUB36D36OC2U75LLD36FRJWOB7QC
K2CS6TCX2NDVL2ASEHGP4J4K4IJ6FP3ANNKTSIWVG43HPYSBX6ZQC
spd.isValid = spell_direction(spd, beam, DIR_TARGET, TARG_FRIEND, true, "Heal whom?");
spd.isValid = spell_direction(spd, beam, DIR_TARGET,
TARG_FRIEND, true, "Heal whom?");
spd.isValid = spell_direction(spd, beam, DIR_TARGET, TARG_ANY, true, "Heal whom?");
spd.isValid = spell_direction(spd, beam, DIR_TARGET, TARG_ANY, true,
"Heal whom?");