staging: zcache: fix uninitialized variable compile warning

[V2: no code changes, patchset now generated via git format-patch -M]

Fix unitialized variable in zcache which generates warning during build
Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/zcache/zcache-main.c

@@ -1346,7 +1346,7 @@ static int zcache_local_new_pool(uint32_t flags)
 int zcache_autocreate_pool(unsigned int cli_id, unsigned int pool_id, bool eph)
 {
 	struct tmem_pool *pool;
-	struct zcache_client *cli;
+	struct zcache_client *cli = NULL;
 	uint32_t flags = eph ? 0 : TMEM_POOL_PERSIST;
 	int ret = -1;