transition tiles for lava-to-chasm transition,

...which currently doesn't work right.

data/terrain-graphics.cfg

@@ -713,9 +713,13 @@
 #{TERRAIN_ADJACENT_CORNER   -50        K      !OK    O       <name>}
 
 # Lava
+# The lava-to-chasm transistion don't happen when they should
+
 {DISABLE_TRANSITIONS l}
-{TERRAIN_ADJACENT_CORNER       l      !l   !l    52,76 lava-convex}
-{TERRAIN_ADJACENT_CORNER       !l   l      l       56,68 lava-concave}
+{TERRAIN_ADJACENT_CORNER       l      !lX   !lX    52,76 lava-convex}
+{TERRAIN_ADJACENT_CORNER       l      X     !lX    52,76 lava-chasm}
+{TERRAIN_ADJACENT_CORNER       l      !lX   X      52,76 lava-chasm2}
+{TERRAIN_ADJACENT_CORNER       !lX   l      l       56,68 lava-concave}
 
 # Chasm
 {DISABLE_TRANSITIONS X}