[trunk] Fix compilation errors when JPWL and/or MJ2 are build
[trunk] Rework fseek ifdefs blockers, it breaks the 64bits behavior for fseeko
[trunk] Fix remainings warnings on linux/32bits arch
[trunk] Rework assertion to work on 32bits system
[trunk] Add debug info to track issue 80
Update issue 80
[trunk] Re-active old warning about missing SOP marker