the default gc needs to see rb_shape_obj_has_id

Author: eightbitraptor

gc/default/default.c

@@ -29,6 +29,7 @@
 #include "darray.h"
 #include "gc/gc.h"
 #include "gc/gc_impl.h"
+#include "shape.h"
 
 #ifndef BUILDING_MODULAR_GC
 # include "probes.h"