Fix angering monsters with non-hero magic rays

Can't use gc.context.mon_moving to check if the ray was caused
by hero, as some rays can happen while hero is moving in response
to their action - for example a bolt of lightning from a god.
dobuzz() uses positive type values for magic rays caused by hero,
so just use that.

src/zap.c

@@ -4482,7 +4482,7 @@ dobuzz(
                         if (mon_could_move && !mon->mcanmove) /* ZT_SLEEP */
                             slept_monst(mon);
                         if (abstype != ZT_SLEEP)
-                            wakeup(mon, !gc.context.mon_moving);
+                            wakeup(mon, (type >= 0) ? TRUE : FALSE);
                     }
                 }
                 range -= 2;