with debug parameters, rasdaman experiences a few extra memory leaks

[bbell]

the r_Minterval and r_Point methods ::get_string_representation() allocates memory; however, in some of the debug statements, this function is simply being called in order to output some information.

find the places in the code where this occurs and ensure that correct memory handling is applied.

example stack trace:

==6362== 3 bytes in 1 blocks are definitely lost in loss record 2 of 382
==6362==    at 0x4C27BE3: malloc (vg_replace_malloc.c:299)
==6362==    by 0xBC82889: strdup (in /usr/lib64/libc-2.17.so)
==6362==    by 0xA8DFDD: r_Minterval::get_string_representation() const (minterval.cc:903)
==6362==    by 0x900A13: NullValuesHandler::getNullValues() const (nullvalues.cc:56)
==6362==    by 0x9CEA42: QtConversion::evaluate(std::vector<QtData*, std::allocator<QtData*> >*) (qtconversion.cc:223)
==6362==    by 0x9EFAD4: QtOperationIterator::next() (qtoperationiterator.cc:253)
==6362==    by 0xA12EFC: QueryTree::evaluateRetrieval() (querytree.cc:174)
==6362==    by 0x944599: ServerComm::executeQuery(unsigned long, char const*, ExecuteQueryRes&) (servercomm2.cc:1651)
==6362==    by 0x7B2F3A: doStuff() (directql.cc:1109)
==6362==    by 0x7B3655: main (directql.cc:1176)

for the following commmand:

valgrind --leak-check=full --track-origins=yes directql -q 'select csv(concat (marray x in [ 10 : 31 , 0 : 23 ] values (c[ 2014 , 1 ,x[0],x[1], 50 , 450 , 450 ])) with (marray x in [ 1 : 28 , 0 : 23 ] values (c[ 2014 , 2 ,x[0],x[1], 50 , 450 , 450 ])) with (marray x in [ 1 : 12 , 0 : 23 ] values (c[ 2014 , 3 ,x[0],x[1], 50 , 450 , 450 ])) along 0) from MemTestData as c' --out string -d ~/projects/install/data/RASBASE