fs: befs: Remove useless calls to brelse in befs_find_brun_dblindirect

The calls to brelse are useless since dbl_indir_block and indir_block
are NULL.

Signed-off-by: Salah Triki <salah.triki@gmail.com>
Acked-by: Luis de Bethencourt <luisbg@osg.samsung.com>
diff --git a/fs/befs/datastream.c b/fs/befs/datastream.c
index 41ce077..d7c4bb0 100644
--- a/fs/befs/datastream.c
+++ b/fs/befs/datastream.c
@@ -474,7 +474,6 @@
 			   (unsigned long)
 			   iaddr2blockno(sb, &data->double_indirect) +
 			   dbl_which_block);
-		brelse(dbl_indir_block);
 		return BEFS_ERR;
 	}
 
@@ -499,7 +498,6 @@
 		befs_error(sb, "%s couldn't read the indirect block "
 			   "at blockno %lu", __func__, (unsigned long)
 			   iaddr2blockno(sb, &indir_run) + which_block);
-		brelse(indir_block);
 		return BEFS_ERR;
 	}