Enhancement: Improve error handling in stellar's packet API by checking return values of metadata functions and adding descriptive error logging

deps/timeout/timeout.h

@@ -26,6 +26,11 @@
 #ifndef TIMEOUT_H
 #define TIMEOUT_H
 
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
 #include <stdbool.h> /* bool */
 #include <stdio.h>	 /* FILE */
 
@@ -259,4 +264,8 @@ TIMEOUT_PUBLIC struct timeout *timeouts_next(struct timeouts *, struct timeouts_
 #define timeouts_addf(T, to, timeout) \
 	timeouts_add((T), (to), timeouts_f2i((T), (timeout)))
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* TIMEOUT_H */