mini max doesn't work when opponent has a null move position

[v11580]

The mini max function doesn't work if the opponent has a null move position.

The AI works great for finding mates in one. But in the sample positions below, the AI doesn't find the correct move because the opponent is in stalemate IF given a null move. I think it has to do with the AI reading the depth as being "0," and because of this, the AI quits calculating the minimax too early.

Here are sample positions where the opponent has no null ply move:

"https://lichess.org/analysis/standard/8/8/5p2/3k1bbK/8/4q3/8/8 b - - 0 1"
"https://lichess.org/analysis/standard/8/1b6/5p2/6p1/6Pp/7P/5k1K/r7 b - - 0 4"
"https://lichess.org/analysis/standard/3k4/8/4Q3/8/1B3K2/8/8/8 w - - 0 1"

Be sure to copy everything inside the link quotes.