Compiling current HEAD with gcc 4.1.1 make AC_CFLAGS="-g -fstrict-aliasing -O3 -Wstrict-aliasing" -j3 CC=gcc

turned up a few "will break strict-aliasing rules" warnings: libldap/cyrus.c libldap/getdn.c clients/tools/ldapsearch.c servers/slapd/sasl.c

I've silenced all of those. Whether the code was actually unsafe before and is safer now is anybody's guess; I was unable to get any of it to misbehave with various combinations of optimization switches.

There are warnings about using the BerElementBuffer "might break strict-aliasing rules" which I've chosen to ignore. Since the memory is only actually referenced through the BerElement pointer, whether or not the contents are defined when accessing the BerElementBuffer is irrelevant. (I.e., we never access it that way, so it's moot.)