scratch/igc updated (4312900f4e8 -> 2416148bf23)

[Pip Cet]

pipcet pushed a change to branch scratch/igc.

      from  4312900f4e8 * src/alloc.c (SET_SYMBOL_MARKED): Remove unused define 
to silence warning.
       new  1b810e1b9e3 Adjust markers considered in bytepos<->charpos 
conversion
       new  2416148bf23 Ensure empty strings are unique and pure


Summary of changes:
 src/alloc.c  | 15 +++++----------
 src/marker.c | 12 +++++-------
 2 files changed, 10 insertions(+), 17 deletions(-)