compositor-drm: Be patient when output creation fails

Do not fail if e.g. only one of 3 connectors cant be enabled.
Could be that we just have not enough crtcs available.

compositor/compositor-drm.c

@@ -570,8 +570,10 @@ create_outputs(struct drm_compositor *ec, int option_connector)
 		    (option_connector == 0 ||
 		     connector->connector_id == option_connector)) {
 			if (create_output_for_connector(ec, resources,
-							connector, x, y) < 0)
-				return -1;
+							connector, x, y) < 0) {
+				drmModeFreeConnector(connector);
+				continue;
+			}
 
 			x += container_of(ec->base.output_list.prev,
 					  struct wlsc_output,