AP_AHRS Example or AP_InertialSensor Example or AP_InertialNav Example don't successfully init ins

What steps will reproduce the problem?
1. Modify example to have debug printf before and after ins.init
2. Build and Upload
3. Check serial output, will get debug before ins.init but not after.

What is the expected output? What do you see instead?
Expected: The two debug printf and the example output.
Actual: The debug printf before ins.init and nothing more.

What version of the product are you using? On what operating system?
Using Mac OSX 10.6 with ArduPilot-Arduino-1.0.3-Mac.zip from the ardupilot-mega 
downloads.

Please provide any additional information below.
AP_AHRS example needs the serial port initialized before the debug printf will 
work, the hal.uartA->begin is missing

Original issue reported on code.google.com by julian.t...@gmail.com on 28 Dec 2012 at 2:32

zd880105132 / ardupilot-mega

AP_AHRS Example or AP_InertialSensor Example or AP_InertialNav Example don't successfully init ins #840