Fix datatype of queue item length macros (#1286) #3009

Job	Run time
CMake Example with Native GCC	18s
Native GCC (macos-latest)	3m 48s
Native GCC (ubuntu-latest)	1m 32s
WIN32 MingW	3m 3s
WIN32 MSVC	2m 44s
GNU MSP430 Toolchain	2m 8s
GNU ARM Toolchain	1m 46s
GCC MicroBlaze Toolchain	3m 48s
	19m 7s

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