[ruby/resolv] Check the second RegGetValue type #678

Job	Run time
omnibus compilations, trigger	2s
omnibus compilations, #1	28m 53s
omnibus compilations, #2	34m 20s
omnibus compilations, #3	36m 28s
omnibus compilations, #4	27m 7s
omnibus compilations, #8	25m 56s
omnibus compilations, #7	31m 18s
omnibus compilations, #5	29m 57s
omnibus compilations, #9	26m 5s
omnibus compilations, #6	29m 51s
omnibus compilations, #11	26m 34s
omnibus compilations, #10	29m 15s
omnibus compilations, #12	15m 25s
omnibus compilations, result	7s
	5h 41m 18s

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