Fix bug in new UA driver #2672

Job	Run time
build-postlib-release	10m 50s
build-drivers-release	4m 39s
build-all-debug	5m 45s
build-all-debug-single	3m 39s
build-test-uadriver-debug	1m 49s
rtest-module-drivers	2m 53s
rtest-modules-debug	4m 45s
build-openfast-release	4m 31s
build-interfaces-release	4m 4s
build-fastfarm-release	12m 38s
rtest-interfaces	4m 31s
rtest-OF-simulink	10m 23s
rtest-OF-5MW_Land_AeroMap	1m 22s
rtest-OF-5MW_OC4Semi_WSt_WavesWN	1m 20s
rtest-OF	6m 49s
rtest-OF-5MW_Land_BD_DLL_WTurb	1m 58s
rtest-OF-5MW_OC3Mnpl_DLL_WTurb_WavesIrr	1m 30s
rtest-OF-5MW_OC3Trpd_DLL_WSt_WavesReg	4m 28s
rtest-OF-5MW_OC4Jckt_DLL_WTurb_WavesIrr_MGrowth	1m 14s
rtest-OF-linearization	2m 31s
rtest-FF	2m 0s
	1h 33m 39s

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