Fix InputEventJoypadMotion::action_match for 0 axis values.

Make action_match ignore the sign if axis value is 0.
This means that an axis value of 0 will match actions defined for both positive and negative values, as expected.

Fixes #12223

core/os/input_event.cpp

@@ -637,7 +637,7 @@ bool InputEventJoypadMotion::action_match(const Ref<InputEvent> &p_event) const
 	if (jm.is_null())
 		return false;
 
-	return (axis == jm->axis && (axis_value < 0) == (jm->axis_value < 0));
+	return (axis == jm->axis && ((axis_value < 0) == (jm->axis_value < 0) || jm->axis_value == 0));
 }
 
 String InputEventJoypadMotion::as_text() const {