fix compile problems (operator<() must be const)

stepmania/src/Inventory.cpp

@@ -81,7 +81,8 @@ bool Inventory::OnComboBroken( PlayerNumber pn, int iCombo )
 	int* iItems = GAMESTATE->m_iItems[pn];
 
 	// search for the item acquired
-	for( int item=0; item<(int)m_ItemDefs.size(); item++ )
+	int item;
+	for( item=0; item<(int)m_ItemDefs.size(); item++ )
 		if( m_ItemDefs[item].comboLevel > iCombo )
 			break;
 
@@ -177,4 +178,4 @@ void Inventory::RemoveAllActiveItems()
 {
 	for( int p=0; p<NUM_PLAYERS; p++ )
 		m_ActiveItems[p].clear();
-}
+}

stepmania/src/Inventory.h

@@ -35,7 +35,7 @@ public:
 		int comboLevel;
 		CString effect;
 
-		bool operator<( const ItemDef& other ) { return comboLevel < other.comboLevel; }
+		bool operator<( const ItemDef& other ) const { return comboLevel < other.comboLevel; }
 		void Sort( vector<ItemDef>& items ) { sort( items.begin(), items.end() ); }
 	};
 	vector<ItemDef>	m_ItemDefs;