get_integer_list
Description:
[ CCode ( array_length_type = "gsize" ) ]
public int[] get_integer_list (string group_name, string key) throws KeyFileError
  public int[] get_integer_list (string group_name, string key) throws KeyFileError
Returns the values associated with key under group_name as integers.
If key cannot be found then null is returned and throws is set
       to g_key_file_error_key_not_found. Likewise, if the values associated with key cannot be 
      interpreted as integers, or are out of range for int, then null
       is returned and throws is set to g_key_file_error_invalid_value.
Parameters:
| this | a KeyFile | 
| group_name | a group name | 
| key | a key | 
| length | the number of integers returned | 
Returns:
| the values associated with the key as a list of integers, or null if the key was not found or could not be parsed. The returned list of integers should be freed with g_free when no longer needed. |