Count corpses left by zombies for draugr same-race sacrifice

When zombies die, their corpses are transformed into default racial corpses, e.g. orc zombie->orc. This meant that you could only do same-race sacrifice as a draugr by chancing upon a draugr NPC or wishing explicitly for a 'foo zombie corpse.'

This allows corpses left by zombies to be used as well.

Author: saltwaterterrapin

doc/evilhack-changelog.md

@@ -3501,3 +3501,4 @@ The following changes to date are:
 - Fix: drawbridges crush both rider and steed
 - Fix: stethoscopes shouldn't open chests
 - Fix: blunt weptools had +4 TH bonus
+- Count corpses left by zombies for draugr same-race sacrifice

src/pray.c

@@ -1743,7 +1743,8 @@ dosacrifice()
 
         if (your_race(ptr)
             || (Race_if(PM_ELF) && is_drow(ptr))
-            || (Race_if(PM_DROW) && is_elf(ptr))) {
+            || (Race_if(PM_DROW) && is_elf(ptr))
+            || (Race_if(PM_DRAUGR) && otmp->zombie_corpse)) {
             if (is_demon(raceptr(&youmonst))) {
                 You("find the idea very satisfying.");
                 exercise(A_WIS, TRUE);