Warning fixes

[gergondet]

As of https://github.com/jrl-umi3218/sot-core/commit/6547447f2f62cb87b150e8102ef02cdbdc07a2bf I don't have any more warnings with gcc-4.2 and current master of sot-core dependencies, except for:

• warnings from boost itself (uniquely unused parameters from ublas)
• warnings for unused parameters from sot-core

For the first one we can't do much and don't generate much output anyway.

The ones from sot-core are much more annoying because: a\ they generate kind of huge scary warning messages for nothing as gcc reports where it happens in case of instanciation and with templates they are huge b\ we can fix them

There's (at least) two ways to fix that: 1\ Cast unused parameter to (void), this is easy and quick (with no impact ?) 2\ Use variable attributes from gcc (cf http://gcc.gnu.org/onlinedocs/gcc/Variable-Attributes.html#Variable-Attributes ) which basically tells to gcc that a particular may be unused in the function but it shouldn't worry about it, this seems cleaner but is most likely non compatible with other compilers so introduce a UNUSED(x) macro for example which in the end is not so clean

We could also let this warnings be :-)

[fbleibel]

I would personnally go for the beatles option for now and try to make it work on the robot first...

[gergondet]

A much simpler fix is actually to not name the parameters you don't want to use, this is simple, quick and has absolutely no impact, win :-)