geo ref images using time offset - incorrect date time information from exif data is used

When using geo-ref images time offset geo tagging function, the wrong data is used from the image exif - data/time appears as 0001:01:01 00:00:00

to reproduce:

open geo-ref images, load any log and any set of images. Select time offset and hit estimate offset. Observe something like this:

1 Picture GOPR8717 with DateTime: 0001:01:01 00:00:00
1 GPS Log Msg: 2017:10:27 17:39:21
1 Est: -63644722761.6

The gopro date and time exif information was correct in this example, I've checked with images from other cameras, etc. as well.

Versions tested
1.3.50
1.3.50.3

Start in the Geo-ref Images workflow, reproduce the time offset calculation with the reported images and log, and inspect how EXIF date/time is read before Estimate Offset. Done means the correct image capture time is used instead of 0001:01:01 00:00:00 and the estimated offset matches the GPS log.

Written by the indexing model from the issue text.