Fix edgecase segfault of BigDecimal#remainder #453

Job	Run time
ruby-versions / Generate Ruby versions	3s
ubuntu-latest 3.2	38s
ubuntu-latest 2.7	1m 5s
ubuntu-latest 3.0	34s
ubuntu-latest debug	46s
ubuntu-latest head	34s
macos-14 3.1	30s
ubuntu-latest 3.4	34s
ubuntu-latest 3.3	34s
ubuntu-latest 3.1	34s
macos-14 2.7	57s
macos-latest 3.1	34s
macos-latest head	25s
macos-latest 3.4	28s
macos-latest 3.0	25s
macos-latest 3.2	25s
macos-latest debug	27s
macos-latest 2.7	1m 2s
macos-latest 3.3	22s
macos-14 debug	29s
macos-14 3.0	26s
macos-14 3.4	28s
windows-latest head	6m 30s
windows-latest 3.4	3m 38s
macos-14 head	24s
windows-latest 2.7	5m 9s
windows-latest mswin	2m 53s
windows-latest 3.3	5m 19s
windows-latest mingw	3m 21s
macos-14 3.3	37s
macos-14 3.2	27s
	40m 38s

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