ECPG timestamp '%j'

Michael,
 While looking at complaints from the Coverity scanner system, it looks like it's detected a case in ECPG where we
providea "day-of-year" format option (%j), but we never actually calculate what the day of year *is*, resulting in an
uninitializedvalue.
 
 Other parts of the code (non-ECPG) appears to realize that timestamp2tm doesn't fill in day-of-year in the struct and
theycalculate it afterwards.  Perhaps ECPG needs to adopt that approach also, perhaps either in dttofmtasc_replace() or
PGTYPEStimestamp_fmt_asc()..?
 I was able to get what I believe is an incorrect result through a bit of hacking on the ECPG test cases:
 timestamp_fmt_asc: 0: 10922-abc%
 after adding:
   out = (char*) malloc(32);   i = PGTYPEStimestamp_fmt_asc(&ts1, out, 31, "%j-abc%%");   printf("timestamp_fmt_asc:
%d:%s\n", i, out);   free(out);
 
 into pgtypeslib/dt_test.pgc.
 If you don't have time to look into this, let me know and I'll try and get back to it soon.
     Thanks!
    Stephen