kernel/slab: Run slab_object automatically when the 0xdeadbeef assert fails.

src/system/kernel/slab/Slab.cpp

@@ -1295,7 +1295,7 @@ object_cache_alloc(object_cache* cache, uint32 flags)
 #if PARANOID_KERNEL_FREE
 	if (cache->object_size >= (sizeof(void*) * 2)) {
 		ASSERT_ALWAYS_PRINT(*(uint32*)object == 0xdeadbeef,
-			"object %p", object);
+			"object %p @! slab_object %p", object, object);
 	}
 #endif