Fix last market price

-The last market price was not properly checking against trading pairs and was updating based on all pairs for the default exchange which could potentially cause non-BTC markets to show a much higher last price value than normal

lib/database.js

@@ -779,8 +779,8 @@ module.exports = {
             history: obj.trades,
             summary: obj.stats
           }, function() {
-            // check if this is the default market
-            if (market == settings.markets_page.default_exchange.exchange_name) {
+            // check if this is the default market and trading pair and that the price is recorded in BTC
+            if (market == settings.markets_page.default_exchange.exchange_name && settings.markets_page.default_exchange.trading_pair.toUpperCase() == coin_symbol.toUpperCase() + '/' + pair_symbol.toUpperCase() && pair_symbol.toUpperCase() == 'BTC') {
               // this is the default market so update the last price stats
               Stats.updateOne({coin: settings.coin.name}, {
                 last_price: obj.stats.last,