correction : display duration in hours,minutes,sec

Correction for flight time hours calculation.

Flight time should display : 36h44m08sec but shows 2204min08sec.

![bug](https://cloud.githubusercontent.com/assets/1732355/2937245/2df2efc2-d892-11e3-9b7e-397dbc247d09.png)

Correction will display hours :

![fix](https://cloud.githubusercontent.com/assets/1732355/2937353/5fb622f0-d89b-11e3-8ce9-1bc766be8044.png)