fixed compilation error
fixed compilation error

compilation with optimization enabled failed with
.../pathfinder/compiler/mil/milgen.brg: In function ?do_reduce?:
.../pathfinder/compiler/mil/milgen.brg:7493: error: ?str? may be used uninitialized in this function
.../pathfinder/compiler/mil/milgen.brg:7494: error: ?qname_id? may be used uninitialized in this function
.../pathfinder/compiler/mil/milgen.brg:7495: error: ?qname_cont? may be used uninitialized in this function

fixed by initilizing all three variables on their declaration to NULL
(I hope NULL is the correct initial default value)

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