make: Weaken over aggressive check-amount-access test

Changelog-None

Makefile

@@ -567,7 +567,7 @@ check-discouraged-functions:
 # since it risks overflow.
 check-amount-access:
 	@! (git grep -nE "(->|\.)(milli)?satoshis" -- "*.c" "*.h" ":(exclude)common/amount.*" ":(exclude)*/test/*" | grep -v '/* Raw:')
-	@! git grep -nE "\\(struct amount_(m)?sat\\)" -- "*.c" "*.h" ":(exclude)common/amount.*" ":(exclude)*/test/*"
+	@! git grep -nE "\\(struct amount_(m)?sat\\)" -- "*.c" "*.h" ":(exclude)common/amount.*" ":(exclude)*/test/*" | grep -vE "sizeof.struct amount_(m)?sat."
 
 # For those without working cppcheck
 check-source-no-cppcheck: check-makefile check-source-bolt check-whitespace check-spelling check-python check-includes check-shellcheck check-setup_locale check-tmpctx check-discouraged-functions check-amount-access