- Remove unneeded checks from autogen.sh (all of them are also checked in configure.ac)
- Move AM_CPPFLAGS=-$(top_srcdir), which was included in nearly every Makefile, to configure.ac
- Remove -g from CFLAGS for usual builds. This should be set by the buildscripts instead
- Remove CFLAGS_OVERRIDE, which was rendered obsolete by the above change
git-svn-id: svn+ssh://svn.gna.org/svn/warzone/trunk@1332 4a71c877-e1ca-e34f-864e-861f7616d084