NULL dereference can cause by malformed file

[insuyun]

Hi, all. By fuzzing I found a NULL derefence in openjpeg.
Here is the file and ASAN result.
Thanks.

./bin/opj_decompress -i ~/projects/qsym-eval/apps/openjpeg/output/afl2/crashes/id:000026,sig:11,src:003366+000047,op:splice,rep:4 -o a.raw

===========================================
The extension of this file is incorrect.
FOUND ep:4. SHOULD BE .jp2
===========================================

[INFO] JP2 IHDR box: compression type indicate that the file is not a conforming JP2 file (41)
[INFO] Start to read j2k main header (85).
[INFO] Main header has been correctly decoded.
[INFO] No decoded area parameters, set the decoded area to the whole image
[INFO] Stream reached its end !
Raw image characteristics: 3 components
Component 0 characteristics: 64979x64x7 unsigned
ASAN:SIGSEGV
=================================================================
==72379== ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x00000040cf23 sp 0x7fffffff91e0 bp 0x7fffffff9380 T0)
AddressSanitizer can not provide additional info.
    #0 0x40cf22 (/home/insu/projects/openjpeg/build/bin/opj_decompress+0x40cf22)
    #1 0x4149d9 (/home/insu/projects/openjpeg/build/bin/opj_decompress+0x4149d9)
    #2 0x409c77 (/home/insu/projects/openjpeg/build/bin/opj_decompress+0x409c77)
    #3 0x7ffff3dfaf44 (/lib/x86_64-linux-gnu/libc-2.19.so+0x21f44)
    #4 0x402de8 (/home/insu/projects/openjpeg/build/bin/opj_decompress+0x402de8)
==72379== ABORTING

[rouault]

Cannot replicate with current master. Closing as fixed