[FIX] replaced gcc46 by gcc48 in travis
[FIX] fixed signed warning
[FIX] fixed unused typedef warnings
[FIX] fixed gcc48 installation in travis
[FIX] removed unused warning
[FIX] replaced gcc46 by gcc48 and tuned travis
[FIX] added missing ;
Merge pull request #223 from weese/feature/fix-remove-sam-warnings

[FIX] SAM warnings and unused typedef removed, Travis tuned