Add missing returns after Rust calls to prevent fallthrough

Author: VS7686

src/lib_ccx/networking.c

@@ -104,7 +104,7 @@ void connect_to_srv(const char *addr, const char *port, const char *cc_desc, con
 {
 #ifndef DISABLE_RUST
 	(void)ccxr_connect_to_srv(addr, port, cc_desc, pwd);
-
+	return;
 #endif
 	if (NULL == addr)
 	{
@@ -139,7 +139,7 @@ void net_send_header(const unsigned char *data, size_t len)
 {
 #ifndef DISABLE_RUST
 	(void)ccxr_net_send_header(data, len);
-
+	return;
 #endif
 	assert(srv_sd > 0);
 
@@ -256,7 +256,7 @@ void net_send_epg(
 {
 #ifndef DISABLE_RUST
 	(void)ccxr_net_send_epg(start, stop, title, desc, lang, category);
-
+	return;
 #endif
 	size_t st;
 	size_t sp;