Filter out unset (-1) corpsenm before calling touch_petrifies.
While here, cleanup the oselect by doing excluding loop
and use can_touch_safely for filtering (suggested by entrez).
corpsenm can be -1 (for EGGs and TINs) so touch_petrifies
using this as index would point to bad entry.
Fix this by making mstoning as helper function and bailing
out early if corpsenm <= LOW_PM (while keeping MEDUSA as is)
TIN or EGG can have the corpsenm not assigned into a
proper monster and instead have an value of -1.
Take this into account in assigning the monster (fptr)
pointer to only point into >= LOW_PM monste entries.
If tutorial is entered, we get following leak on exit:
=================================================================
==81358==ERROR: LeakSanitizer: detected memory leaks
Direct leak of 96 byte(s) in 3 object(s) allocated from:
#0 0x7f6996edefdf in __interceptor_malloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:69
#1 0x5601c255bcbb in alloc /home/miku/src/NetHack/src/alloc.c:71
Indirect leak of 5064 byte(s) in 3 object(s) allocated from:
#0 0x7f6996edefdf in __interceptor_malloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:69
#1 0x5601c255be1e in alloc /home/miku/src/NetHack/src/alloc.c:71
#2 0x5601c255be1e in dupstr /home/miku/src/NetHack/src/alloc.c:236
SUMMARY: AddressSanitizer: 5160 byte(s) leaked in 6 allocation(s).
Fix this by freeing the cloned selection before returning.
Mika Kuoppala