replaced memcpy calls for overlapping areas with memmove().
git-svn-id: svn://svn.code.sf.net/p/quakespasm/code/trunk/quakespasm@66 af15c1b1-3010-417e-b628-4374ebc0bcbd
port (on Unix, argv[0] is command name and is not empty).
git-svn-id: svn://svn.code.sf.net/p/quakespasm/code/trunk/quakespasm@18 af15c1b1-3010-417e-b628-4374ebc0bcbd