Clamp fix for new method

src/engine/InterestManagement/Terrain.java

@@ -56,8 +56,8 @@ public class Terrain {
         this.terrain_size.x = this.zone.major_radius * 2;
         this.terrain_size.y = this.zone.minor_radius * 2;
 
-        this.cell_count.x = this.image_size.x;
-        this.cell_count.y = this.image_size.y;
+        this.cell_count.x = this.image_size.x - 1;
+        this.cell_count.y = this.image_size.y - 1;
 
         this.cell_size.x = terrain_size.x / this.cell_count.x;
         this.cell_size.y = terrain_size.y / this.cell_count.y;