databases/p5-DBD-cego: update 1.5.0 -> 1.5.2

• In dbdimp.h, changed MAXPROTSTRING to 15 ( from 10 ), since the protocol string "fastserial" does not fit in. Problems have just been observed on Ubuntu Linux
• Fix of some memory leaks in dbdimp.c for function cego_st_execute. The msg and schema attribute of statement handle have to be checked for allocated values, before new memory is allocated

Author: Björn Lemke <lemke@lemke-it.com>