* src/fileio.cc (save_iochannel): Add comment about assertions and
reorganize the code a bit.
(Regexxer::save_file): Elaborate on why IOChannel::close() is
used explicitely.

* src/filetreeprivate.cc (FileTreePrivate::collatekey_sort_func):
Fix oversight:  Subtracting two unsigned values and converting the
result to a signed type relies on implementation-defined behavior.
Explicitely cast the operands to a signed type before substraction.

* src/main.cc (main): Use g_get_prgname() instead of the string
literal PACKAGE_TARNAME in the error message for Glib::OptionError
exceptions.

svn path=/trunk/; revision=621