Comment 13 for bug 269002

Tested with some very simple paths:
1. Square (10cm): 100 cm² (correct).
2. Circle (r=5cm): 78.56 cm² (should be 78.54 cm²).
3. Isosceles triangle (b=h=10cm): 49.98 cm² (should be 50 cm²).
4. Right rectangle (b=h=10cm): 50 cm² (correct).

2 and 3 accuracy errors are less than 0.1%, almost the same as what we get when using the length measurement type.

Commit?