Add -Wall -Werror as default C/CXX flags
Fix warning
Fix warning
Fix warning
Fix warning
Fix warning
Fix warning
Fix warning
Fix warning
Fix warning
Fix warning
Fix warning
Fix warning
Fix warning
Fix warning
Fix warning
Fix warning
Merge branch 'feature/Wall'

* feature/Wall:
  Fix warning
  Fix warning
  Fix warning
  Fix warning
  Fix warning
  Fix warning
  Fix warning
  Fix warning
  Fix warning
  Fix warning
  Fix warning
  Fix warning
  Fix warning
  Fix warning
  Fix warning
  Fix warning
  Add -Wall -Werror as default C/CXX flags
Fix warning
Fix warning