Small fix to multi_weight.hpp

Author: Superharz

include/bh_python/multi_weight.hpp

@@ -31,18 +31,13 @@ struct multi_weight_value : public boost::span<T> {
         return !operator==(values);
     }
 
-    // template <class S>
-    // void operator+=(const S values) {
-    // void operator+=(const std::vector<T> values) {
-    //     if(values.size() != this->size())
-    //         throw std::runtime_error("size does not match");
-    //     auto it = this->begin();
-    //     for(const T& x : values)
-    //         *it++ += x;
-    // }
-    // void operator+=(const boost::span<T> values) {
-    template <class S>
-    void operator+=(const S values) {
+    void operator+=(const std::vector<T> values) {
+         operator+=(boost::span<T>(values));
+    }
+
+    void operator+=(const boost::span<T> values) {
+    //template <class S>
+    //void operator+=(const S values) {
         if(values.size() != this->size())
             throw std::runtime_error("size does not match");
         auto it = this->begin();