house v2 tool fix

app/service/house/v2/tool.js

@@ -91,7 +91,7 @@ class ToolService extends Service {
         let notice = '';
         let status = 0;
         let invest_items = [];
-        if (balance < 0) {
+        if (balance <= 0) {
             status = 2;//完全有能力买到房
             notice = '您的资金已满足本项目首付条件，还有更多项目在您预算范围内。一键预约，轻松看房！';
             return { status, notice, invest_items };