Add original_colour field

Author: dextercd

nsew/nsew/world_ffi.lua

@@ -237,13 +237,15 @@ struct CLiquidCell {
     struct Cell cell;
     int x;
     int y;
-    char unknown1;
+    char unknown1; // 0x20
     char unknown2;
     bool is_static;
     char unknown3;
-    int unknown4[3];
+    float unknown4; // 0x24
+    float unknown5; // 0x28
+    float unknown6;
     struct Colour colour;
-    unsigned not_colour;
+    struct Colour original_colour;
 };
 
 typedef struct Cell (*cell_array)[0x40000];