grib1 driver should print warnings to stderr

[jluis]

Hi,

Not sure if this should be classified as a bug or an enhancement. The grib1 driver prints the warnings to stdout but it should do it to stderr. This poses a problem with GMT when the output is redirected to a pstscript file. In cases when warnings are issued, like it happened recently with messages like "Warning! : Can't figure out time unit of 4" the postscript file is corrupted with the presence of those "warnings". The solution is to simply print the warnings to stderr.

Joaquim Luis

[warmerdam]

I have confirmed that the degrib library has many plain printf's apparently used for warnings and errors. The following query may find most of them.

% pwd                                                        /wrk/home/warmerda/tree-gdal/trunk/gdal/frmts/grib/degrib18
% grep printf */*.c | grep -v -i sprintf | grep -v fprintf | less

Generally I hesitate to make changes in the degrib code because I know it will all be lost again when the code is next replaced from upstream. As such, I've been treating this as low priority.

[Jukka Rahkonen]

If developers say that they treat some fix as low priority it tends to mean the same as won't fix.