fix unitialized variable in eval_strfunc
fix unitialized variable in eval_strfunc

turingstudio/nasm,techkey/nasm,projedi/nasm,letolabs/nasm,projedi/nasm,techkey/nasm,turingstudio/nasm,Distrotech/nasm,projedi/nasm,techkey/nasm,projedi/nasm,projedi/nasm,Distrotech/nasm,techkey/nasm,Distrotech/nasm,Distrotech/nasm,techkey/nasm,letolabs/nasm,turingstudio/nasm,turingstudio/nasm,letolabs/nasm