fix AbstractMethodError when calling World#chunkAtBlock

Author: ImMorpheus

src/main/java/org/spongepowered/api/world/server/ServerWorld.java

@@ -82,6 +82,11 @@ default UUID uniqueId() {
         return this.properties().uniqueId();
     }
 
+    @Override
+    default WorldChunk chunkAtBlock(final Vector3i blockPosition) {
+        return this.chunkAtBlock(blockPosition.x(), blockPosition.y(), blockPosition.z());
+    }
+
     @Override
     default WorldChunk chunkAtBlock(final int bx, final int by, final int bz) {
         final Vector3i chunkPos = this.engine().chunkLayout().forceToChunk(bx, by, bz);