btrfs-progs: compilation errors when using musl libc

- limits.h must be included to pick up PATH_MAX.
- remove double declaration of BTRFS_DISABLE_BACKTRACE

kerncompat.h assumed that if __GLIBC__ was not defined,
it could safely define BTRFS_DISABLE_BACKTRACE, however this can be
defined by the configure script. Added a check to ensure it is not
defined first.

Signed-off-by: Brendan Heading <brendanheading@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/cmds-scrub.c b/cmds-scrub.c
index b7aa8091..5a85dc47 100644
--- a/cmds-scrub.c
+++ b/cmds-scrub.c
@@ -34,6 +34,7 @@
 #include <ctype.h>
 #include <signal.h>
 #include <stdarg.h>
+#include <limits.h>
 
 #include "ctree.h"
 #include "ioctl.h"