look_here() arguments

Add LOOKHERE_NOFLAGS to use instead of 0 for look_here()'s 2nd arg.
Fix the call to look_here() that passed FALSE.

src/invent.c

@@ -4296,7 +4296,7 @@ dolook(void)
        MSGTYPE={norep,noshow} "You see here"
        interfere with feedback from the look-here command */
     hide_unhide_msgtypes(TRUE, MSGTYP_MASK_REP_SHOW);
-    res = look_here(0, FALSE);
+    res = look_here(0, LOOKHERE_NOFLAGS);
     /* restore normal msgtype handling */
     hide_unhide_msgtypes(FALSE, MSGTYP_MASK_REP_SHOW);
     return res;