Clean up the code in bin/ to reduce warnings from GCC3.

Clean up the code in bin/ to reduce warnings from GCC3.

Stage 2 of 5 or so: small cleanups across several programs.
- Convert ``quad'' types to ``long long''.
- Convert appropriate ``int'' types to ``size_t''.
- Fix comment syntax to use /* */ instead of //.
- Initialize a variable before using it.
- Remove an unneeded cast.

Submitted-by: Simon 'corecode' Schubert <corecode@fs.ei.tum.de>