save as to shapefile for postgis layers with tool long column names doens't work

[cmoe]

Save as to shapefile for postgis layers with tool long column names doens't work.

1. Load a postgis layer with a column that has more then 10 charactes in its name (e.g. archive_date)
2. save as esri shapefile
3. The following error appears:
   

Export to vector file failed.
Error: created field archive_date not found (OGR error: 
Normalized/laundered field name: 'archive_date' to 'archive_da')

4. The created shapefile is empty

The expected truncation from archive_date to archive_da in the resulting shapefile works (the shp, shx,dbf is created). The dbf shows the truncated archive_da but no features are exported.

[jef]

fixed in r14276.