pathing: raise TR2 creature slot limit

This brings TR2 into line with TR1 in terms of the maximum number of
enemies at a time.

Resolves #1624.

docs/tr2/CHANGELOG.md

@@ -12,6 +12,7 @@
 - changed the default fog distance to 22 tiles cutting off at 30 tiles to match TR1X (#1622)
 - changed the number of static mesh slots from 50 to 256 (#2734)
 - changed the maximum number of items (moveables) per level from 256 to 10240 (1024 remains the limit for triggered items) (#1794)
+- changed the maximum number of visible enemies from 5 to 32 (#1624)
 - fixed the inability to completely mute the sounds, even at sound volume 0 (#2722)
 - fixed the final two levels not allowing for secrets to be counted in the statistics (#1582)
 - fixed Lara's holsters being empty if a game flow level removes all weapons but also re-adds the pistols (#2677)

docs/tr2/README.md

@@ -326,6 +326,7 @@ as Notepad.
 - expanded maximum texture pages from 32 to 128
 - expanded the number of static mesh slots from 50 to 256
 - expanded maximum number of items (moveables) from 256 to 10240 (1024 remains the limit for triggered items)
+- expanded maximum number of visible enemies from 5 to 32
 - ported audio decoding library to ffmpeg
 - ported video decoding library to ffmpeg
 - ported input backend to SDL

src/libtrx/include/libtrx/game/pathing/const.h

@@ -4,12 +4,11 @@
 
 #define NO_BOX (-1)
 #define BOX_ZONE(num) (((num) / STEP_L) - 1)
+#define LOT_SLOT_COUNT 32
 #if TR_VERSION == 1
     #define MAX_ZONES 2
-    #define LOT_SLOT_COUNT 32
 #else
     #define MAX_ZONES 4
-    #define LOT_SLOT_COUNT 5
 #endif
 
 #define BOX_BLOCKED 0x4000