esx: Fix a bug in the XML code for storage pools

For ESX, the code that builds XML descriptions for attached storage pools was
not setting the host count to anything when it returned a host name.

src/esx/esx_storage_backend_vmfs.c

@@ -488,6 +488,7 @@ esxStoragePoolGetXMLDesc(virStoragePoolPtr pool, unsigned int flags)
         if (VIR_ALLOC_N(def.source.hosts, 1) < 0)
             goto cleanup;
         def.type = VIR_STORAGE_POOL_NETFS;
+        def.source.nhost = 1;
         def.source.hosts[0].name = nasInfo->nas->remoteHost;
         def.source.dir = nasInfo->nas->remotePath;