Some more Coverity shutupness

src/syncterm/conn.c

@@ -575,7 +575,8 @@ connected:
 		ioctlsocket(sock, FIONBIO, &nonblock);
 		if (!socket_recvdone(sock, 0)) {
 			int keepalives = true;
-			setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (void *)&keepalives, sizeof(keepalives));
+			if (setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (void *)&keepalives, sizeof(keepalives)))
+				fprintf(stderr, "%s:%d: Error %d calling setsockopt()\n", __FILE__, __LINE__, errno);
 
 			if (!bbs->hidepopups)
 				uifc.pop(NULL);

src/syncterm/ssh.c

@@ -184,7 +184,8 @@ ssh_connect(struct bbslist *bbs)
 	}
 
         /* we need to disable Nagle on the socket. */
-	setsockopt(ssh_sock, IPPROTO_TCP, TCP_NODELAY, (char *)&off, sizeof(off));
+	if (setsockopt(ssh_sock, IPPROTO_TCP, TCP_NODELAY, (char *)&off, sizeof(off)))
+		fprintf(stderr, "%s:%d: Error %d calling setsockopt()\n", __FILE__, __LINE__, errno);
 
 	SAFECOPY(password, bbs->password);
 	SAFECOPY(username, bbs->user);

src/syncterm/telnets.c

@@ -63,7 +63,8 @@ telnets_connect(struct bbslist *bbs)
 	}
 
         /* we need to disable Nagle on the socket. */
-	setsockopt(ssh_sock, IPPROTO_TCP, TCP_NODELAY, (char *)&off, sizeof(off));
+	if (setsockopt(ssh_sock, IPPROTO_TCP, TCP_NODELAY, (char *)&off, sizeof(off)))
+		fprintf(stderr, "%s:%d: Error %d calling setsockopt()\n", __FILE__, __LINE__, errno);
 
 	if (!bbs->hidepopups)
 		uifc.pop(NULL);

src/syncterm/term.c

@@ -2386,8 +2386,10 @@ get_cache_fn_subdir(struct bbslist *bbs, char *fn, size_t fnsz, const char *subd
 		return ret;
 	strcat(fn, subdir);
 	backslash(fn);
-	if (!isdir(fn))
-		mkpath(fn);
+	if (!isdir(fn)) {
+		if (mkpath(fn))
+			return 0;
+	}
 	if (!isdir(fn))
 		return 0;
 	return 1;