add nanopb (manual)

components/spotify/cspot/bell/nanopb/tests/fuzztest/validation.h

@@ -0,0 +1,12 @@
+/* This module validates that the message structures are in valid state
+ * after decoding the input data. */
+ 
+#ifndef VALIDATION_H
+#define VALIDATION_H
+
+#include <pb.h>
+
+void validate_message(const void *msg, size_t structsize, const pb_msgdesc_t *msgtype);
+
+#endif
+