libericstools: list: Remove tautologic comparison from boolean.

Since an `unsigned` variable is always non-negative, we don't need to test
it. If that failed, then we would have real trouble with the toolchain.

Also, while we are at it, remove some pesky trailing whitespaces from the
lines of the function.

Signed-off-by: Rogério Brito <rbrito@ime.usp.br>
bwmon-gargoyle: Document why an allocated FILE leak is OK.

If the operating system were not helpful, we would need to fix the code by
checking in separate the status of the input file and the status of the
output file and deallocating/closing them.

Signed-off-by: Rogério Brito <rbrito@ime.usp.br>
qos-gargoyle: Remove unused parameter for fprintf.

While we are at it, we also remove some trailing whitespace in the function.

Signed-off-by: Rogério Brito <rbrito@ime.usp.br>