chore(agent): add check for request uri

Author: hahuja2

agent/fw_cakephp.c

@@ -295,8 +295,12 @@ NR_PHP_WRAPPER(nr_cakephp_error_handler_wrapper) {
     nrl_verbosedebug(NRL_FRAMEWORK, "%s: unable to record exception", __func__);
   }
 
-  nr_txn_set_path("CakePHP", NRPRG(txn), request_uri, NR_PATH_TYPE_URI,
-                  NR_NOT_OK_TO_OVERWRITE);
+  if (NULL != request_uri) {
+    nr_txn_set_path("CakePHP", NRPRG(txn), request_uri, NR_PATH_TYPE_URI,
+                    NR_OK_TO_OVERWRITE);
+  } else {
+    nrl_verbosedebug(NRL_FRAMEWORK, "%s: request uri is NULL", __func__);
+  }
 
 end:
   nr_php_arg_release(&exception);