fixed #14732 - fixed potential crash with incomplete preprocessor directive #19703

Job	Run time
build_cmake (ubuntu:24.04, true, true)	12m 35s
build_make (ubuntu:24.04)	3m 51s
build_cmake (alpine:3.23, false, false)	12m 35s
build_make (ubuntu:25.10)	3m 17s
build_make (alpine:3.23)	12m 35s
build_cmake (ubuntu:25.10, true, true)	5m 44s
	50m 37s

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