Fix for FreeBSD #1, we don't have alloca.h there
Fix for FreeBSD #1, we don't have alloca.h there

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