found by valgrind:
==2559== 16 bytes in 1 blocks are definitely lost in loss record 3 of 19
==2559==    at 0x4C2720E: malloc (vg_replace_malloc.c:236)
==2559==    by 0x412F7E: pretty_sizes (utils.c:1054)
==2559==    by 0x4179E9: main (mkfs.c:1395)

Signed-off-by: Sergei Trofimovich <[email protected]>
---
 mkfs.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/mkfs.c b/mkfs.c
index 32f25f5..c8b19c1 100644
--- a/mkfs.c
+++ b/mkfs.c
@@ -1176,6 +1176,7 @@ int main(int ac, char **av)
        char *output = "output.img";
        u64 num_of_meta_chunks = 0;
        u64 size_of_data = 0;
+       char * pretty_buf;
 
        while(1) {
                int c;
@@ -1395,7 +1396,8 @@ raid_groups:
        printf("fs created label %s on %s\n\tnodesize %u leafsize %u "
            "sectorsize %u size %s\n",
            label, first_file, nodesize, leafsize, sectorsize,
-           pretty_sizes(btrfs_super_total_bytes(&root->fs_info->super_copy)));
+           pretty_buf = 
pretty_sizes(btrfs_super_total_bytes(&root->fs_info->super_copy)));
+       free (pretty_buf);
 
        printf("%s\n", BTRFS_BUILD_VERSION);
        btrfs_commit_transaction(trans, root);
-- 
1.7.3.4

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