shuf: Fix OOM crash for huge number ranges #1918

Job	Run time
Build the fuzzers	3m 23s
Run the fuzzers (fuzz_test, true)	2m 15s
Run the fuzzers (fuzz_date, false)	3m 47s
Run the fuzzers (fuzz_expr, true)	3m 53s
Run the fuzzers (fuzz_printf, false)	2m 55s
Run the fuzzers (fuzz_echo, true)	3m 52s
Run the fuzzers (fuzz_seq, false)	2m 53s
Run the fuzzers (fuzz_sort, false)	1m 23s
Run the fuzzers (fuzz_wc, false)	1m 24s
Run the fuzzers (fuzz_cut, false)	3m 16s
Run the fuzzers (fuzz_split, false)	3m 1s
Run the fuzzers (fuzz_parse_glob, true)	3m 46s
Run the fuzzers (fuzz_parse_size, true)	3m 44s
Run the fuzzers (fuzz_parse_time, true)	3m 42s
	43m 14s

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