Fix #14708 FP uninitialized variable reported for array decay to poin… #19693

Job	Run time
build_cmake (ubuntu:25.10, true, true)	5m 24s
build_make (ubuntu:24.04)	4m 19s
build_cmake (ubuntu:24.04, true, true)	4m 51s
build_make (ubuntu:25.10)	4m 52s
build_cmake (alpine:3.23, false, false)	4m 19s
build_make (alpine:3.23)	5m 55s
	29m 40s

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