fdt: Check for NULL return from fdt_getprop in 'fdt set'
While the previous pass through fixed one place where we knew that fdt_getprop would be given a positive len, in the case of 'fdt set' we do not, so check that we did no get NULL from fdt_getprop(). Cc: Simon Glass <sjg@chromium.org> Reported-by: Coverity (CID: 163249) Fixes 72c98ed1 ("fdt: Add a check to do_fdt() for coverity") Signed-off-by: NTom Rini <trini@konsulko.com> Reviewed-by: NSimon Glass <sjg@chromium.org>
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