Merge pull request #246 from MrAnno/fix-grpc-leaks

grpc: add global destructor to avoid leaks when the module is not used

modules/grpc/protos/apphook.cpp

@@ -1,4 +1,5 @@
 /*
+ * Copyright (c) 2024 Axoflow
  * Copyright (c) 2024 László Várady
  *
  * This program is free software; you can redistribute it and/or modify it
@@ -58,3 +59,9 @@ grpc_register_global_initializers(void)
       initialized = TRUE;
     }
 }
+
+static void __attribute__((destructor))
+_protobuf_cleanup(void)
+{
+  google::protobuf::ShutdownProtobufLibrary();
+}