Fix Wonder Guard not blocking 0 base power moves

MR Description

• This MR fixes a bug that let offensive moves having 0 bp in Studio through Wonder Guard, re-guard-less of the type chart.

Before testing

• Pick a few moves from this list and send these against a Wonder Guard Pokémon (Shedinja or anything else).

Tests to realize

• Make sure the move is blocked by WG if its type isn't Super Effective against the target having WG.
• Make sure the move is not blocked by WG if its type is Super Effective against the target having WG.

Sources related to this MR

• Bulbapedia link
• Pokepedia link
• Discord link of the dev topic