incrementing variable in 'repeat until' loop inside warped procedure gives wrong result

[pufferfish101007]

Says 90 on main. This is a regression from v0.0.8.

[pufferfish101007]

There are two problems here:

• const folding seemingly ignores the fact that the variable is mutated in the loop so folds it down to 0 - this doesn't happen if loop unrolling is enabled, so there's something differing between how if/else and loops are handled
• the () > () block does not work for comparing numbers to strings, because "10" is not greater than "9"