checks: Fix crash with multiple source annotations

Commit 3616b9a811b6 ("checks: Use source position information for check
failures") causes crashes when there's a check message with multiple
source annotations. Drop the errant addition to the str pointer left
over from the previous version.

Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
1 file changed