Bail early on pitch() if one was not actually requested

src/main.lua

@@ -225,6 +225,9 @@ end
 ---@param pitchTypeIndex number | nil
 ---@param accuracy number The closer to 1.0, the better
 function Game:pitch(pitchFlyTimeMs, pitchTypeIndex, accuracy)
+    if pitchTypeIndex == nil then
+        return -- No throw!
+    end
     self.state.ball:markUncatchable()
     self.state.ball.heldBy = nil
     self.state.pitchIsOver = false