Changed so that if weapons with "Use" effect cannot be equipped, "Use" cannot be used

Weapons with "Use" effect have been changed so that if they cannot be equipped, "Use" cannot be used. This applies to the Bragi Sword, the Fire Brand, etc.

In the original, only the Light Brand has "equipable" as an individual condition for determining the use effect. Until now, such determination was not made for use effects added by hacks, but this time, it has been changed so that the same determination is made for all use effects.