Some improvements to the gsasl vapi file
This fixes the signature for two of the gsasl functions. Without this change, using sha1() and hmac_sha1() can not be used because vala specifies a size argument for the output argument.
This fixes the signature for two of the gsasl functions. Without this change, using sha1() and hmac_sha1() can not be used because vala specifies a size argument for the output argument.