exif fixes.
authortsteven4 <tsteven4@f51c46e8-681c-474f-0cfe-069cfd0219fb>
Tue, 2 Apr 2013 23:09:10 +0000 (23:09 +0000)
committertsteven4 <tsteven4@f51c46e8-681c-474f-0cfe-069cfd0219fb>
Tue, 2 Apr 2013 23:09:10 +0000 (23:09 +0000)
commitc175016bfc926174a40b889eff6df23253eb2bde
tree03458c806398d75103696ccd16c7c7277060088e
parent2716e3c2384de17c1a086a53142b441c31b387b5
exif fixes.
supply default speed_ref for the reader.
report undefined alt_refs in the reader.
correctly output the gps tag version tag in the writer.
use the correct value for the altitude reference tag in the writer so that negative altitudes are correctly written.

git-svn-id: http://gpsbabel.googlecode.com/svn/trunk@4375 f51c46e8-681c-474f-0cfe-069cfd0219fb
gpsbabel/exif.cc