build

Fix self-reference in NA_MD_LOOP for Windows Ruby 3.4 / Fedra43 #62

Job	Run time
Build on ruby-head-debug (debug)	2m 1s
fedora	1m 36s
ubuntu ruby-2.7	1m 18s
ubuntu ruby-2.6	1m 33s
ubuntu ruby-3.0	1m 2s
ubuntu ruby-3.3	1m 6s
macos ruby-2.6	1m 2s
ubuntu ruby-3.2	1m 5s
ubuntu ruby-3.1	1m 5s
ubuntu ruby-head	1m 13s
macos ruby-3.2	32s
macos ruby-2.7	57s
macos ruby-3.1	41s
ubuntu ruby-3.4	1m 12s
windows ruby-3.0	2m 34s
macos ruby-3.0	31s
macos ruby-3.4	36s
macos ruby-head	35s
windows ruby-3.2	2m 30s
windows ruby-2.7	3m 3s
windows ruby-3.1	2m 29s
macos ruby-3.3	30s
windows ruby-2.6	3m 19s
windows ruby-3.3	2m 14s
windows ruby-3.4	2m 20s
windows ruby-head	2m 19s
	39m 23s

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