fraction_compare
Description:
Compares the fractions a_n/a_d and b_n/b_d and returns -1 if a < b, 0 if a = b and 1 if 
      a > b.
Parameters:
| a_n | Numerator of first value | 
| a_d | Denominator of first value | 
| b_n | Numerator of second value | 
| b_d | Denominator of second value | 
Returns:
| -1 if a < b; 0 if a = b; 1 if a > b. | 
Namespace: Gst.Util
  
  Package: gstreamer-1.0