Sets value to the range specified by numerator_start/denominator_start and numerator_end
/denominator_end.
| value |
a GValue initialized to GST_TYPE_FRACTION_RANGE |
| numerator_start |
the numerator start of the range |
| denominator_start |
the denominator start of the range |
| numerator_end |
the numerator end of the range |
| denominator_end |
the denominator end of the range |