dht: initialize layout type

Instead of relying on CALLOC's zero initialization which happens
to be the value of DHT_HASH_TYPE_DM, explicitly set the value

Signed-off-by: Anand V. Avati <avati@amp.gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 523 (Hash type is not initialized in dht_layout_new)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=523

xlators/cluster/dht/src/dht-common.h

@@ -50,6 +50,11 @@ struct dht_layout {
 typedef struct dht_layout dht_layout_t;
 
 
+typedef enum {
+	DHT_HASH_TYPE_DM,
+} dht_hashfn_type_t;
+
+
 struct dht_local {
 	int                      call_cnt;
 	loc_t                    loc;

xlators/cluster/dht/src/dht-hashfn.c

@@ -29,11 +29,6 @@
 #include "hashfn.h"
 
 
-typedef enum {
-	DHT_HASH_TYPE_DM,
-} dht_hashfn_type_t;
-
-
 int
 dht_hash_compute_internal (int type, const char *name, uint32_t *hash_p)
 {

xlators/cluster/dht/src/dht-layout.c

@@ -51,6 +51,7 @@ dht_layout_new (xlator_t *this, int cnt)
 		goto out;
 	}
 
+        layout->type = DHT_HASH_TYPE_DM;
 	layout->cnt = cnt;
         if (conf)
                 layout->gen = conf->gen;