Make WIZARD unconditional.

src/exper.c

@@ -171,13 +171,11 @@ const char *drainer;	/* cause of death, if drain should be fatal */
 {
 	register int num;
 
-#ifdef WIZARD
 	/* override life-drain resistance when handling an explicit
 	   wizard mode request to reduce level; never fatal though */
 	if (drainer && !strcmp(drainer, "#levelchange"))
 	    drainer = 0;
 	else
-#endif
 	    if (resists_drli(&youmonst)) return;
 
 	if (u.ulevel > 1) {