* app/tile.c
* app/tile.h
* app/tile_manager.c
* app/tile_swap.c:
Allocate Tile's array of TileRowHints dynamically. Make type
of TileRowHint explicit since it's fairly space-critical.
Can save several hundred K of memory with this and struct
changes.
Added warnings for old basically-untested-or-insane
paths through the tile referencing code.
* app/tile_pvt.h: Shrink down and rearrange fields of Tile
struct to save some space with gcc's padding for most people.
* app/paint_funcs.c: Use tile_sanitize_rowhints() to ensure
that rowhints have been allocated before use.
* app/channel_ops.c
* app/gdisplay.c
* app/pixel_region.c: Cosmetic, sanity or unfinished debug
changes (the latter commented out) for fun and reference.
22b8c94feb