Cancel rename if file does not exist

(cherry picked from commit bb2684f4a71ea6cc150824223a3ec864770a56e2)

core/bind/core_bind.cpp

@@ -2501,11 +2501,13 @@ Error _Directory::rename(String p_from, String p_to) {
 	ERR_FAIL_COND_V_MSG(!d, ERR_UNCONFIGURED, "Directory must be opened before use.");
 	if (!p_from.is_rel_path()) {
 		DirAccess *d = DirAccess::create_for_path(p_from);
+		ERR_FAIL_COND_V_MSG(!d->file_exists(p_from), ERR_DOES_NOT_EXIST, "File does not exist.");
 		Error err = d->rename(p_from, p_to);
 		memdelete(d);
 		return err;
 	}
 
+	ERR_FAIL_COND_V_MSG(!d->file_exists(p_from), ERR_DOES_NOT_EXIST, "File does not exist.");
 	return d->rename(p_from, p_to);
 }
 Error _Directory::remove(String p_name) {