[SRU][B,F,G] Fix incorrect printk format compile warning

[Kamal Mostafa]

BugLink: https://bugs.launchpad.net/bugs/1902254

This mainline commit, recently backported to [B,F,G] for the bug above:
    "btrfs: extent-tree: kill BUG_ON() in __btrfs_free_extent()"
introduces a compile warning.

The warning has been fixed in mainline by:
    cad69d139651 btrfs: tree-checker: fix incorrect printk format
so let's pick up that fix too.

This patch is a trivial backport of that fix, which applies to [B,F,G].

 -Kamal

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Pujin Shi (1):
  btrfs: tree-checker: fix incorrect printk format

 fs/btrfs/extent-tree.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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2.17.1