Instead of storing pickled objects in a dynamic column, we store them

directly in BLOB. They will be identified in function mariadb_get_pickled()
under the following conditions:
- First two bytes must be 0x8003
- Last byte must be 0x2E
- the depickling call must return a valid (not NULL) object.

include/mariadb_python.h

@@ -113,7 +113,6 @@ typedef struct {
   uint8_t free_me;
   void *buffer;
   unsigned char num[8];
-  DYNAMIC_COLUMN dyncol;
   MYSQL_TIME tm;
 } MrdbParamValue;