-fixed a quite serious scene corruption bug when saving that has been around for months.

good thing no one ran into it :P

core/io/resource_format_binary.cpp

@@ -2172,10 +2172,11 @@ Error ResourceFormatSaverBinaryInstance::save(const String &p_path,const RES& p_
 
 			save_unicode_string("local://"+itos(r->get_subindex()));
 			if (takeover_paths) {
-				r->set_path(p_path+"::"+itos(ofs_pos.size()),true);
+				r->set_path(p_path+"::"+itos(r->get_subindex()),true);
 			}
-		} else
+		} else {
 			save_unicode_string(r->get_path()); //actual external
+		}
 		ofs_pos.push_back(f->get_pos());
 		f->store_64(0); //offset in 64 bits
 	}