New branch: [sm5a2futures]

Want to make sure we don't cause conflicts for future 1a builds.

This commit: change the sentinel for launching attacks immediately.

This way, songs with negative gaps can have attacks work here.

Thanks to Saturn for the assist.

src/Player.cpp

@@ -2859,7 +2859,7 @@ void Player::UpdateJudgedRows()
 
 				Attack attMineAttack;
 				attMineAttack.sModifiers = ApplyRandomAttack();
-				attMineAttack.fStartSecond = -1.0f;
+				attMineAttack.fStartSecond = attMineAttack.ATTACK_STARTS_NOW;
 				attMineAttack.fSecsRemaining = fAttackRunTime;
 
 				m_pPlayerState->LaunchAttack( attMineAttack );