backend/drm: avoid gcc stringop-truncation warning

backend/drm/drm.c

@@ -1317,8 +1317,8 @@ void scan_drm_connectors(struct wlr_drm_backend *drm) {
 			wlr_output_init(&wlr_conn->output, &drm->backend, &output_impl,
 				drm->display);
 
-			strncpy(wlr_conn->output.name, wlr_conn->name,
-				sizeof(wlr_conn->output.name) - 1);
+			memcpy(wlr_conn->output.name, wlr_conn->name,
+				sizeof(wlr_conn->output.name));
 
 			wlr_conn->output.phys_width = drm_conn->mmWidth;
 			wlr_conn->output.phys_height = drm_conn->mmHeight;