fixed typos in code the gets only active/used in case GDK_MEM_TRACE is defined:
fixed typos in code the gets only active/used in case GDK_MEM_TRACE is defined:

"membat" -> "memBat"  &  "stackbat" -> "stackBat"

(No, I did not "search" to find this, it just popped into my eyes
 when *glancing* over the diffs in the check-in message.
 Honestly!)

zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb