G729b Coder application doesn't produces out bit stream at 8kbits/sec rate

```
What steps will reproduce the problem?
1. Record 5 seconds of speech data in 16bit PCM using 8KHz sampling freq.
2. Encode using binary build from coder.c application

What is the expected output? What do you see instead?
The size of 5 seconds speech record at 16 bit PCM with 8k sample freq. is 80000
Bytes raw data file (produced 128 Kbits/sec ) which is perfect. But the bit
stream output file generated by G729 Annex B coder application produces 59344
bytes with VAD enabled and 82000 bytes VAD disabled which is not a 8Kbits /Sec
rate.

What version of the product are you using? On what operating system?
Latest SVN and in Ubuntu 12.10

Please provide any additional information below.
I expect that g729 Annex B algorithm should produce the stream file at 8Kbits
rate so expected file size in bytes would be 5000 bytes file size.

```

Original issue reported on code.google.com by `vimales...@gmail.com` on 23 Oct 2013 at 5:24