Support for GCC 4.7

Support for GCC 4.7

Compatibility with GCC v 4.7 is required.

This commit fix problems with compilation GCC 4.7.

[Issue#] N/A
[Bug] The repository causes build break with GCC 4.7
[Cause] N/A
[Solution] Source code adjusted to GCC 4.7

[Verification]
1. Build repository (with current version = 4.5)

Change-Id: I78ef8c986dd811841605d0e1b18fc641343287e3