Fix: run finalizer when an object is manually freed.

Only applies to large objects, since small objects are never freed
manually (NOOP).

This shouldn't happen since references aren't expected to be freed
manually, but still implemented to bugs further down the line.

src/global_allocator.c

@@ -247,6 +247,10 @@ void GC_GlobalAllocator_deallocateLarge(GlobalAllocator *self, void *pointer) {
     Chunk *chunk = (Chunk *)pointer - 1;
     chunk->allocated = (uint8_t)0;
 
+    if (Object_hasFinalizer(&chunk->object)) {
+        Object_runThenClearFinalizer(&chunk->object);
+    }
+
     // TODO: merge with next free chunks (?)
 }