zapit: avoid unaligned access in parseBouquetsXml()

SH4 kernels are complaining about unaligned accesses when bouquets.xml
with urls are parsed. Even though this should be fixed in the XML
parsing library, this seems not easy, so let's add a simple workaround
to avoid the messages in the kernel log.

src/zapit/src/bouquets.cpp

@@ -449,6 +449,9 @@ void CBouquetManager::parseBouquetsXml(const char *fname, bool bUser)
 				if (uName)
 					uname = uName;
 				const char *url = xmlGetAttribute(channel_node, "u");
+				if (url && ((uintptr_t)url % 4))
+					url = std::string(url).c_str(); /* hack to ensure buffer is aligned */
+
 				GET_ATTR(channel_node, "i", SCANF_SERVICE_ID_TYPE, service_id);
 				GET_ATTR(channel_node, "on", SCANF_ORIGINAL_NETWORK_ID_TYPE, original_network_id);
 				GET_ATTR(channel_node, "s", SCANF_SATELLITE_POSITION_TYPE, satellitePosition);