Make btrfs-progs compile with -fstrict-aliasing (included in -O2) again.

This is done by doing a two-step conversion (rather than a one-step).
First, the variable goes from type * to void *, and then to
implicitly to void **.
(Not sure if this is "good practice", but it shuts up the compiler,
so it seems the compiler takes into account that we are actually punning
it this way.)

1 files changed, 1 insertions, 1 deletions

diff --git a/btrfsck.c b/btrfsck.c
index 628dfc3c..d8bfa537 100644
--- a/btrfsck.c
+++ b/btrfsck.c
@@ -420,7 +420,7 @@ int check_extent_refs(struct btrfs_root *root,
 	int err = 0;
 
 	while(1) {
-		ret = radix_tree_gang_lookup(extent_radix, (void **)rec, 0,
+		ret = radix_tree_gang_lookup(extent_radix, (void *)rec, 0,
 					     ARRAY_SIZE(rec));
 		if (!ret)
 			break;