PlatformIO generator - exit with clearer message when no `nanopb_protos` specified (fix #723)
diff --git a/generator/platformio_generator.py b/generator/platformio_generator.py
index 452424c..8c4699c 100644
--- a/generator/platformio_generator.py
+++ b/generator/platformio_generator.py
@@ -18,7 +18,7 @@
 nanopb_plugin_options = env.GetProjectOption("nanopb_options", "")
 
 if not nanopb_protos:
-    print("[nanopb] No `nanopb_protos` specified, exiting.")
+    print("[nanopb] No generation needed.")
     exit(0)
 
 if isinstance(nanopb_plugin_options, (list, tuple)):