fix for [#6950] Blender crashes when .blog file top line is 160 characters or more
- made sure BLI_convertstringcode doesn't return more than 240 chars
- went through all callers and fixed places where string passed to BLI_convertstringcode was too short
- TODO: look into increasing sample->name and sound->name too, I prevented crashes, but filename might get shortened.
d9de141077