btrfs-map-logical: segfaults when no output file is given

when no output file is given, info_file stays NULL and the following
fprintf segfaults. Default to stdout.

Signed-off-by: Arne Jansen <sensille@gmx.net>
Signed-off-by: Hugo Mills <hugo@carfax.org.uk>

diff --git a/btrfs-map-logical.c b/btrfs-map-logical.c
index 6d3ef7a..d79a73a 100644 (file)
--- a/btrfs-map-logical.c
+++ b/btrfs-map-logical.c
@@ -173,6 +173,7 @@ int main(int ac, char **av)
                exit(1);
        }
 
+       info_file = stdout;
        if (output_file) {
                if (strcmp(output_file, "-") == 0) {
                        out_fd = 1;