- continue converting rpmdb.c to use headerGetExtension.
- continue converting rpmdb.c to use headerGetExtension.

devzero2000/RPM5,devzero2000/RPM5,devzero2000/RPM5,devzero2000/RPM5,devzero2000/RPM5,devzero2000/RPM5,devzero2000/RPM5