Fixed GCC 3.3.3 warning:
cpu.c:154: warning: use of conditional expressions as lvalues is deprecated
cpu.c:154: warning: use of cast expressions as lvalues is deprecated


git-svn-id: https://dosemu.svn.sourceforge.net/svnroot/dosemu/trunk@440 7758b857-130e-0410-ab9c-d8735a528d18