don't process hold note logic while paused

SM_Pause can be sent from elsewhere to pause
START unpauses when paused
don't move on to another screen when paused

stepmania/src/ScreenGameplay.cpp

@@ -1147,6 +1147,9 @@ void ScreenGameplay::PauseGame( bool bPause )
 		this->PlayCommand( "Pause" );
 	else
 		this->PlayCommand( "Unpause" );
+
+	FOREACH_EnabledPlayer(p)
+		m_Player[p].SetPaused( m_bPaused );
 }
 
 // play assist ticks
@@ -1320,6 +1323,10 @@ void ScreenGameplay::Update( float fDeltaTime )
 	if( SCREENMAN->GetTopScreen() != this )
 		return;
 
+	/* Update actors when paused, but never move on to another state. */
+	if( m_bPaused )
+		return;
+
 	if( GAMESTATE->m_MasterPlayerNumber != PLAYER_INVALID && !m_MaxCombo.GetHidden() )
 		m_MaxCombo.SetText( ssprintf("%d", STATSMAN->m_CurStageStats.m_player[GAMESTATE->m_MasterPlayerNumber].iMaxCombo) ); /* MAKE THIS WORK FOR BOTH PLAYERS! */
 	
@@ -1732,6 +1739,14 @@ void ScreenGameplay::Input( const DeviceInput& DeviceI, const InputEventType typ
 	if( type == IET_LEVEL_CHANGED )
 		return;
 
+	if( m_bPaused )
+	{
+		/* If we're paused, only accept MENU_BUTTON_START to unpause. */
+		if( MenuI.IsValid() && MenuI.button == MENU_BUTTON_START && type == IET_FIRST_PRESS )
+			this->PauseGame( false );
+		return;
+	}
+
 	if( MenuI.IsValid()  &&  
 		m_DancingState != STATE_OUTRO  &&
 		!m_Back.IsTransitioning() )
@@ -2390,6 +2405,11 @@ void ScreenGameplay::HandleScreenMessage( const ScreenMessage SM )
 	case SM_StopMusic:
 		m_pSoundMusic->Stop();
 		break;
+
+	case SM_Pause:
+		if( !m_bPaused )
+			PauseGame( true );
+		break;
 	}
 }