* In order to fix memory leaks:

* In order to fix memory leaks:
     - Test/TestWriteSimple.cxx: added cleaning of free store through
       some delete calls.
     - src/gdcmBinEntry.cxx: fix to avoid SegFault.
     - src/gdcmDicomDir.[cxx|h]: fixed initialisation in constructor
       gdcmDicomDir::gdcmDicomDir(bool) [either the constructor itself
       (through the call to ::AddDicomDirMeta()) or the destructor
       would crash when deleting uninitialized ::metaElems].
     - src/gdcmDictEntry.cxx: annotation of ununderstood memory leak.
     - src/gdcmDocument.cxx:
       -- ::~gdcmDocument() destructor now cleans up all dictionary entries
          from dynamic stores.
       -- ::ParseDES() misplaced deletion of temporary NewDocEntry
          was causing memory leaks.
     - src/gdcmSQItem.cxx:
       -- ::~gdcmSQItem() dummy code cleaned (learned that deletion is
          cleanly handled with polymophism: sorry but my milage is low).
       -- ::SetEntryByNumber(string, guint16, guint16) now cleanly allocates
          a gdcmValENtry, and makes no assumption on type (gdcmDocEntry,
          gdcmSeqEntry vs gdcmValEntry) of existing entry (when present).
          This avoids SegFaulting.
     - src/gdcmSQItem.h: coding style.
    * Conclusion:
     - Test/TestWriteSimple still severely sucks. The output image content
       (when $(GDCMDATA_HOME)/012345.002.050.dcm in input) is brain
       damaged when displayed with vtkgdcmViewer.
     - on memory leaks: TestWriteSimple leaks really less (see entry
       of 2004-06-18 in Changelog file for the call to valgrind).
     - on segfaults: ctest now passes all the tests but one (no more
       segfaults).