Make sure we always release Lua lock

I have a sneaking suspicion that this also magically fixes memory cards
on Linux.

src/ActorFrame.cpp

@@ -238,6 +238,7 @@ void ActorFrame::DrawPrimitives()
 		m_DrawFunction.PushSelf( L );
 		if( lua_isnil(L, -1) )
 		{
+			LUA->Release(L);
 			LuaHelpers::ReportScriptErrorFmt( "Error compiling DrawFunction" );
 			return;
 		}
@@ -487,6 +488,7 @@ void ActorFrame::UpdateInternal( float fDeltaTime )
 		m_UpdateFunction.PushSelf( L );
 		if( lua_isnil(L, -1) )
 		{
+			LUA->Release(L);
 			LuaHelpers::ReportScriptErrorFmt( "Error compiling UpdateFunction" );
 			return;
 		}

src/NoteSkinManager.cpp

@@ -487,6 +487,7 @@ Actor *NoteSkinManager::LoadActor( const RString &sButton, const RString &sEleme
 
 	if( !PushActorTemplate(L, sButton, sElement, bSpriteOnly) )
 	{
+		LUA->Release( L );
 		// ActorUtil will warn about the error
 		return Sprite::NewBlankSprite();
 	}
@@ -494,6 +495,7 @@ Actor *NoteSkinManager::LoadActor( const RString &sButton, const RString &sEleme
 	auto_ptr<XNode> pNode( XmlFileUtil::XNodeFromTable(L) );
 	if( pNode.get() == NULL )
 	{
+		LUA->Release( L );
 		// XNode will warn about the error
 		return Sprite::NewBlankSprite();
 	}

src/Player.cpp

@@ -3142,6 +3142,7 @@ void Player::SetHoldJudgment( TapNote &tn, int iTrack )
 		Lua* L = LUA->Get();
 		tn.PushSelf(L);
 		msg.SetParamFromStack( L, "TapNote" );
+		LUA->Release( L );
 
 		MESSAGEMAN->Broadcast( msg );
 	}