MATCH: Fix zero_one_valued_p's convert pattern

MATCH: Fix zero_one_valued_p's convert pattern

While working on PR 111972, I was getting a regression
due to zero_one_valued_p matching a signed 1 bit integer
when it came to convert. This patch fixes that by checking
the outer type too.

Bootstrapped and tested on x86_64-linux-gnu with no regressions.

gcc/ChangeLog:

	* match.pd (zero_one_valued_p): For convert
	make sure type is not a signed 1-bit integer.

Signed-off-by: Andrew Pinski <quic_apinski@quicinc.com>