add integer bound check #41582

Job	Run time
build (base)	6m 46s
build (clang)	2m 6s
build-gcc-heli	2m 26s
autotest-heli (sitltest-heli)	10m 7s
autotest (sitltest-copter-tests1a)	7m 18s
autotest (sitltest-copter-tests1b)	9m 30s
autotest (sitltest-copter-tests1c)	11m 28s
autotest (sitltest-copter-tests1d)	8m 44s
autotest (sitltest-copter-tests1e)	8m 49s
autotest (sitltest-copter-tests2a)	9m 9s
autotest (sitltest-copter-tests2b)	28m 48s
	1h 45m 11s

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