Bug: SEGV in function _nc_find_entry

[address@hidden]

POC: https://github.com/zjuchenyuan/fuzzpoc/raw/master/infotocap_poc7

```

Step 11/11 : RUN /tmp/infotocap fuzzpoc/infotocap_poc7 || exit 0
 ---> Running in d705c976c33d
ASAN:SIGSEGV
=================================================================
==6==ERROR: AddressSanitizer: SEGV on unknown address 0x62500004f900 (pc 0x00000044c48f bp 0x0000000a2687 sp 0x7fffffffba00 T0)
    #0 0x44c48e in _nc_find_entry ../ncurses/./tinfo/comp_hash.c:70
    #1 0x42daad in nametrans ../progs/dump_entry.c:174
    #2 0x405c1c in put_translate ../progs/tic.c:339
    #3 0x405c1c in main ../progs/tic.c:1033
    #4 0x7ffff6ac082f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
    #5 0x408cd8 in _start (/tmp/infotocap+0x408cd8)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV ../ncurses/./tinfo/comp_hash.c:70 _nc_find_entry
==6==ABORTING

```

Reproducible Docker image has been pushed to `zjuchenyuan/dockerized_poc:ncurses`, Dockerfile:

```
FROM zjuchenyuan/afl

ENV AFL_USE_ASAN=1 ASAN_OPTIONS="detect_leaks=0"
RUN git clone https://github.com/ThomasDickey/ncurses-snapshots &&\
    cd ncurses-snapshots &&\
    git checkout 8805e9e &&\
    ./configure --disable-shared &&\
    make -j &&\
    cp ./progs/tic /tmp/infotocap

RUN git clone https://github.com/zjuchenyuan/fuzzpoc
RUN /tmp/infotocap fuzzpoc/infotocap_poc7 || exit 0
```

---

zjuchenyuan