Fix problems detected as dead assignment warning by clang scan-build.

Wrong assignment by shutdown result hides the real error code
of NewRequestHandler() in ssdp_device.c.
Fix return code description of NewRequestHandler().
Handle return code from ithread_create in sample applications.
Remove unused assignments.

(forward ported from commit 39dfad2cba)

ChangeLog

@@ -332,6 +332,16 @@ Version 1.8.0
 Version 1.6.18
 *******************************************************************************
 
+2012-04-21 Yoichi NAKAYAMA <yoichi.nakayama(at)gmail.com>
+
+	Fix problems detected as dead assignment warning by clang scan-build.
+
+	Wrong assignment by shutdown result hides the real error code
+	of NewRequestHandler() in ssdp_device.c.
+	Fix return code description of NewRequestHandler().
+	Handle return code from ithread_create in sample applications.
+	Remove unused assignments.
+
 2012-04-20 Yoichi NAKAYAMA <yoichi.nakayama(at)gmail.com>
 
 	Avoid dereference of null pointer in ixmlNode_setNodeProperties.

upnp/sample/linux/tv_combo_main.c

@@ -55,6 +55,9 @@ int main(int argc, char *argv[])
 	}
 	/* start a command loop thread */
 	code = ithread_create(&cmdloop_thread, NULL, TvCtrlPointCommandLoop, NULL);
+	if (code !=  0) {
+		return UPNP_E_INTERNAL_ERROR;
+	}
 #ifdef WIN32
 	ithread_join(cmdloop_thread, NULL);
 #else

upnp/sample/linux/tv_ctrlpt_main.c

@@ -54,6 +54,9 @@ int main(int argc, char **argv)
 	}
 	/* start a command loop thread */
 	code = ithread_create(&cmdloop_thread, NULL, TvCtrlPointCommandLoop, NULL);
+	if (code !=  0) {
+		return UPNP_E_INTERNAL_ERROR;
+	}
 #ifdef WIN32
 	ithread_join(cmdloop_thread, NULL);
 #else

upnp/sample/linux/tv_device_main.c

@@ -53,6 +53,9 @@ int main(int argc, char *argv[])
 
 	/* start a command loop thread */
 	code = ithread_create(&cmdloop_thread, NULL, TvDeviceCommandLoop, NULL);
+	if (code !=  0) {
+		return UPNP_E_INTERNAL_ERROR;
+	}
 #ifdef WIN32
 	ithread_join(cmdloop_thread, NULL);
 #else

upnp/src/gena/gena_device.c

@@ -102,12 +102,11 @@ static int GeneratePropertySet(
 	char *buffer;
 	int counter = 0;
 	size_t size = 0;
-	int temp_counter = 0;
 
 	/*size += strlen(XML_VERSION);*/
 	size += strlen(XML_PROPERTYSET_HEADER);
 	size += strlen("</e:propertyset>\n\n");
-	for (temp_counter = 0, counter = 0; counter < count; counter++) {
+	for (counter = 0; counter < count; counter++) {
 		size += strlen( "<e:property>\n</e:property>\n" );
 		size += 2 * strlen(names[counter]) +
 			strlen(values[counter]) +

upnp/src/genlib/net/http/httpreadwrite.c

@@ -1000,7 +1000,6 @@ static int ReadResponseLineAndHeaders(
 			return num_read;
 		}
 	}
-	done = 0;
 	status = parser_parse_headers(parser);
 	if ((status == (parse_status_t)PARSE_OK) &&
 		(parser->position == (parser_pos_t)POS_ENTITY))

upnp/src/genlib/service_table/service_table.c

@@ -926,7 +926,6 @@ removeServiceTable( IXML_Node * node,
     long unsigned int i = 0lu;
 
     if( getSubElement( "root", node, &root ) ) {
-        current_service = in->serviceList;
         start_search = in->serviceList;
         deviceList =
             ixmlElement_getElementsByTagName( ( IXML_Element * ) root,

upnp/src/ssdp/ssdp_ctrlpt.c

@@ -242,7 +242,6 @@ void ssdp_handle_ctrlpt_msg(http_message_t *hmsg, struct sockaddr_storage *dest_
 		/*hdr_value.buf[ hdr_value.length ] = '\0'; */
 		while (node != NULL) {
 			searchArg = node->item;
-			matched = 0;
 			/* check for match of ST header and search target */
 			switch (searchArg->requestType) {
 			case SSDP_ALL:

upnp/src/ssdp/ssdp_device.c

@@ -169,7 +169,7 @@ void ssdp_handle_device_request(http_message_t *hmsg, struct sockaddr_storage *d
  * \brief Works as a request handler which passes the HTTP request string
  * to multicast channel.
  *
- * \return 1 if successful else appropriate error.
+ * \return UPNP_E_SUCCESS if successful else appropriate error.
  */
 static int NewRequestHandler(
 	/*! [in] Ip address, to send the reply. */
@@ -246,8 +246,7 @@ static int NewRequestHandler(
 	}
 
  end_NewRequestHandler:
-	ret = shutdown(ReplySock, SD_BOTH);
-	if (ret == -1) {
+	if (shutdown(ReplySock, SD_BOTH) == -1) {
 		strerror_r(errno, errorBuffer, ERROR_BUFFER_LEN);
 		UpnpPrintf(UPNP_INFO, SSDP, __FILE__, __LINE__,
 			   "Error in shutdown: %s\n", errorBuffer);

upnp/src/ssdp/ssdp_server.c

@@ -864,7 +864,7 @@ static int create_ssdp_sock_v4(
 		/* This is probably not a critical error, so let's continue. */
 	}
 	/* result is not checked becuase it will fail in WinMe and Win9x. */
-	ret = setsockopt(*ssdpSock, IPPROTO_IP,
+	setsockopt(*ssdpSock, IPPROTO_IP,
 		IP_MULTICAST_TTL, &ttl, sizeof(ttl));
 	onOff = 1;
 	ret = setsockopt(*ssdpSock, SOL_SOCKET, SO_BROADCAST,