fs: befs: remove cast for kmalloc return value

remove cast for kmalloc return value.

Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/fs/befs/btree.c b/fs/befs/btree.c
index a66c9b1..74e397d 100644
--- a/fs/befs/btree.c
+++ b/fs/befs/btree.c
@@ -436,8 +436,7 @@
 		goto error;
 	}
 
-	if ((this_node = (befs_btree_node *)
-	     kmalloc(sizeof (befs_btree_node), GFP_NOFS)) == NULL) {
+	if ((this_node = kmalloc(sizeof (befs_btree_node), GFP_NOFS)) == NULL) {
 		befs_error(sb, "befs_btree_read() failed to allocate %u "
 			   "bytes of memory", sizeof (befs_btree_node));
 		goto error;