[z1979] Fix targeting of most pet spells. They expect to target alive pets

Signed-off-by: Schmoozerd <schmoozerd@scriptdev2.com>

(based on commit 65e675e)

Signed-off-by: Nighoo <nighoo@gmail.com>

(cleaned version of 9063ee3)

(based on commit [s1571] - 42b3033)