optimization: Fix interpretation of certain "division" operations (issue #5)
optimization: Fix interpretation of certain "division" operations (issue #5)

The following command (with default -O2 optimization) would incorrectly not match 8..11:
regex -nx '^((xx)\2)\1' -t 0..15
But with "-O1" added to the command line, it worked properly.

Davidebyzero/RegexMathEngine,Davidebyzero/RegexMathEngine