config: release kernel context on router creation error

Signed-off-by: Eduardo Silva <[email protected]>

Author: edsiper

src/flb_config.c

@@ -307,6 +307,9 @@ struct flb_config *flb_config_init()
     config->router = flb_router_create(config);
     if (!config->router) {
         flb_error("[config] could not create router");
+        if (config->kernel) {
+            flb_kernel_destroy(config->kernel);
+        }
         flb_cf_destroy(cf);
         flb_free(config);
         return NULL;