add break to binary_reader::get_binary and get_string

include/nlohmann/detail/input/binary_reader.hpp

@@ -2271,15 +2271,15 @@ class binary_reader
                     string_t& result)
     {
         bool success = true;
-        std::generate_n(std::back_inserter(result), len, [this, &success, &format]()
-        {
+        for(NumberType i = 0; i < len; i++) {
             get();
             if (JSON_HEDLEY_UNLIKELY(!unexpect_eof(format, "string")))
             {
                 success = false;
+                break;
             }
             return std::char_traits<char_type>::to_char_type(current);
-        });
+        };
         return success;
     }
 
@@ -2303,15 +2303,15 @@ class binary_reader
                     binary_t& result)
     {
         bool success = true;
-        std::generate_n(std::back_inserter(result), len, [this, &success, &format]()
-        {
+        for(NumberType i = 0; i < len; i++) {
             get();
             if (JSON_HEDLEY_UNLIKELY(!unexpect_eof(format, "binary")))
             {
                 success = false;
+                break;
             }
             return static_cast<std::uint8_t>(current);
-        });
+        }
         return success;
     }