removed the value field from attribute_definition because it's a definition and should not hold a value.

source/core/utils/value.cpp

@@ -7,18 +7,15 @@ namespace detail {
 
 void initialize_by_basic_type(basic_type type, database_type &val);
 
-size_t determine_size(const std::string &val)
-{
+size_t determine_size(const std::string &val) {
   return val.size();
 }
 
-size_t determine_size(const char *val)
-{
+size_t determine_size(const char *val) {
   return strlen(val);
 }
 
-size_t determine_size(const blob &val)
-{
+size_t determine_size(const blob &val) {
   return val.size();
 }