plural internationalisation required for a sentence in bufr_template.c

[Michel Van Eeckhout]

in bufr_template.c:777

sprintf( errmsg, _("### Template contains %d descriptors\n"), count );

This sentence should be internationalised with the plural form otherwise when count is one, there is a mistake.

Should be corrected to:

sprintf( errmsg, _n("### Template contains %d descriptor\n", "### Template contains %d descriptors\n", count), count );