* Fixed bug in vector_streambuf: convert_cast to char_type failed. replaced by static_cast.

include/cppcore/misc/vector_streambuf.inl

@@ -90,7 +90,7 @@ namespace cppcore
 
             auto p = this->pptr();
             assert(this->pbase() <= p && p < this->epptr());
-            *p = convert_cast<char_type>(ch);
+            *p = static_cast<char_type>(ch);
             this->pbump(1);
         }
         return ch;