JIT

Fix compiler warning #609

Job	Run time
Interpreter (Debug)	9m 28s
i686-pc-windows-msvc/msvc (Release)	12m 18s
i686-pc-windows-msvc/msvc (Debug)	20m 28s
aarch64-pc-windows-msvc/msvc (Release)	16m 49s
aarch64-apple-darwin/clang (Debug)	13m 47s
x86_64-apple-darwin/clang (Debug)	15m 25s
x86_64-pc-windows-msvc/msvc (Release)	11m 47s
x86_64-unknown-linux-gnu/gcc (Release)	6m 4s
x86_64-apple-darwin/clang (Release)	11m 45s
x86_64-pc-windows-msvc/msvc (Debug)	19m 57s
aarch64-unknown-linux-gnu/gcc (Debug)	8m 0s
aarch64-unknown-linux-gnu/gcc (Release)	6m 20s
aarch64-apple-darwin/clang (Release)	9m 57s
x86_64-unknown-linux-gnu/gcc (Debug)	11m 6s
aarch64-pc-windows-msvc/msvc (Debug)	21m 43s
	3h 14m 54s

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