fix: 修复基建组合不可用时的效率计算错误

fix: https://github.com/MaaAssistantArknights/MaaAssistantArknights/issues/1895

resource/infrast.json

@@ -2991,7 +2991,7 @@
                 ]
             },
             {
-                "allowExternal": true,
+                "allowExternal": false,
                 "desc": "巫恋组",
                 "necessary": [
                     {
@@ -3182,4 +3182,4 @@
         "Dorm",
         "Mfg"
     ]
-}
+}

src/MeoAssistant/InfrastProductionTask.cpp

@@ -471,10 +471,10 @@ bool asst::InfrastProductionTask::optimal_calc()
         if (cur_combs.size() < cur_max_num_of_opers) {
             // 允许外部的话，就把单个干员凑进来
             if (group.allow_external) {
-                for (size_t i = cur_combs.size(); i != cur_max_num_of_opers; ++i) {
-                    size_t index = i - cur_combs.size();
-                    cur_combs.emplace_back(cur_available_opers.at(index));
-                    cur_efficient += cur_available_opers.at(index).efficient.at(m_product);
+                for (size_t index = 0; index < cur_max_num_of_opers - cur_combs.size(); ++index) {
+                    const auto& comb = cur_available_opers.at(index);
+                    cur_combs.emplace_back(comb);
+                    cur_efficient += comb.efficient.at(m_product);
                 }
             }
             else { // 否则这个组合人不够，就不可用了