mkfs.btrfs: fix error text in '-r' mode

Smart gcc noticed use of uninitialized warning when compiled
with -O0 flags:

    mkfs.c:1291: error: 'file' may be used uninitialized in this function

Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
Signed-off-by: Hugo Mills <hugo@carfax.org.uk>

1 files changed, 1 insertions, 1 deletions

diff --git a/mkfs.c b/mkfs.c
index b93b874e..e191b7f2 100644
--- a/mkfs.c
+++ b/mkfs.c
@@ -1287,13 +1287,13 @@ int main(int ac, char **av)
 			block_count = dev_block_count;
 	} else {
 		ac = 0;
+		file = output;
 		fd = open_target(output);
 		if (fd < 0) {
 			fprintf(stderr, "unable to open the %s\n", file);
 			exit(1);
 		}
 
-		file = output;
 		first_file = file;
 		block_count = size_sourcedir(source_dir, sectorsize,
 					     &num_of_meta_chunks, &size_of_data);