Import: pass "downloaded" parameter to process_imported_dives()

process_imported_dives() is more efficient for downloaded than for
imported (from a file) dives, because it checks only the divecomputer
of the first dive.

This condition is checked via the "downloaded" flag of the first
dive. Instead, pass an argument to process_imported_dives().

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

desktop-widgets/divelogimportdialog.cpp

@@ -1007,7 +1007,7 @@ void DiveLogImportDialog::on_buttonBox_accepted()
 		}
 	}
 
-	process_imported_dives(&table, false);
+	process_imported_dives(&table, false, false);
 	MainWindow::instance()->refreshDisplay();
 }