preproc: Use found path when opening include
preproc: Use found path when opening include

It's a typo in 169ac7c152ee13ed0c470ceb3371e9afb10e9a60

https://bugzilla.nasm.us/show_bug.cgi?id=3392378

Reported-by: Ryan Prichard <257ad5b83f39ed4b5ca4d035a302d17e37cbf275@gmail.com>
Signed-off-by: Cyrill Gorcunov <7a1ea01eee6961eb1e372e3508c2670446d086f4@gmail.com>

techkey/nasm,techkey/nasm,techkey/nasm,techkey/nasm,techkey/nasm