[PATCH] common/filter: prepend 0 to treat offset as octal

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The offsets printed by "od" are octal numbers. So, we need to add "0" at
the head of the $offset to parse it as an octal number.

Fixes: 37520a314bd4 ("fstests: Don't use gawk's strtonum")
Signed-off-by: Naohiro Aota <naohiro.aota@xxxxxxx>
---
 common/filter | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/common/filter b/common/filter
index 6140e58368d7..88fcb6ef68ee 100644
--- a/common/filter
+++ b/common/filter
@@ -495,7 +495,7 @@ _filter_od()
 		fi
 
 		offset="${line%% *}"
-		printf '%o%s\n' $((offset / BLOCK_SIZE)) "${line#$offset}"
+		printf '%o%s\n' $(("0$offset" / BLOCK_SIZE)) "${line#$offset}"
 	done
 }
 
-- 
2.24.0




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