fix sonar build #sonar #258

Job	Run time
debug (clang)	3m 12s
avr (c99)	2m 3s
debug (gcc)	3m 13s
optimizations (clang, Release)	1m 7s
avr (c11)	1m 46s
arm (c99)	1m 25s
optimizations (clang, MinSizeRel)	1m 13s
avr (gnu99)	1m 51s
arm (c11)	2m 12s
optimizations (gcc, Release)	1m 24s
avr (gnu11)	1m 35s
arm (gnu99)	1m 52s
optimizations (gcc, MinSizeRel)	1m 12s
sonar	1m 51s
arm (gnu11)	1m 46s
style_check	10s
	27m 52s

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