qcow2: Rename l2_table in count_contiguous_clusters_unallocated()

This function doesn't need any changes to support L2 slices, but since
it's now dealing with slices instead of full tables, the l2_table
variable is renamed for clarity.
Signed-off-by: NAlberto Garcia <berto@igalia.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Reviewed-by: NMax Reitz <mreitz@redhat.com>
Message-id: 78bcc54bc632574dd0b900a77a00a1b6ffc359e6.1517840877.git.berto@igalia.com
Signed-off-by: NMax Reitz <mreitz@redhat.com>

block/qcow2-cluster.c

@@ -406,10 +406,10 @@ static int count_contiguous_clusters(int nb_clusters, int cluster_size,
 
 /*
  * Checks how many consecutive unallocated clusters in a given L2
- * table have the same cluster type.
+ * slice have the same cluster type.
  */
 static int count_contiguous_clusters_unallocated(int nb_clusters,
-                                                 uint64_t *l2_table,
+                                                 uint64_t *l2_slice,
                                                  QCow2ClusterType wanted_type)
 {
     int i;
@@ -417,7 +417,7 @@ static int count_contiguous_clusters_unallocated(int nb_clusters,
     assert(wanted_type == QCOW2_CLUSTER_ZERO_PLAIN ||
            wanted_type == QCOW2_CLUSTER_UNALLOCATED);
     for (i = 0; i < nb_clusters; i++) {
-        uint64_t entry = be64_to_cpu(l2_table[i]);
+        uint64_t entry = be64_to_cpu(l2_slice[i]);
         QCow2ClusterType type = qcow2_get_cluster_type(entry);
 
         if (type != wanted_type) {