Return correct result code for division by zero

Turns out we do need to return FAILURE here on div by zero
exception. Use a three-way return value from div_function_base.

Fixes

Return correct result code for division by zero

Turns out we do need to return FAILURE here on div by zero
exception. Use a three-way return value from div_function_base.

Fixes oss-fuzz #25975.

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