map and cloud fix, add cloud debug

libs/main/containers/pimap.h

@@ -425,6 +425,7 @@ public:
 				--i;
 			}
 		}
+		return *this;
 	}
 
 	//! \~english Same as \a remove().

libs/main/io_devices/piethernet.cpp

@@ -357,8 +357,7 @@ void PIEthernet::applyTimeout(int fd, int opt, double ms) {
 
 
 void PIEthernet::applyOptInt(int level, int opt, int val) {
-	if (sock < 0) return;
-	ethSetsockoptInt(sock, level, opt, val);
+	if (sock != -1) ethSetsockoptInt(sock, level, opt, val);
 	if (sock_s != sock && sock_s != -1) ethSetsockoptInt(sock_s, level, opt, val);
 }
 
@@ -1335,14 +1334,16 @@ void PIEthernet::ethClosesocket(int sock, bool shutdown) {
 
 int PIEthernet::ethSetsockopt(int sock, int level, int optname, const void * optval, int optlen) {
 	if (sock < 0) return -1;
-	return setsockopt(sock,
-	                  level,
-	                  optname,
+	auto ret = setsockopt(sock,
+						  level,
+						  optname,
 #ifdef WINDOWS
-	                  (char *)
+						  (char *)
 #endif
-	                      optval,
-	                  optlen);
+							  optval,
+						  optlen);
+	if (ret != 0) piCout << "setsockopt error:" << ethErrorString();
+	return ret;
 }