Merge upstream libdivecomputer changes from Jef Driesen.
No major changes and no conflicts except for a trivial one where Jef had
marked a couple of private functions 'static' and our versions had
extended the argument lists of those functions.
This just updates to the current upstream state of libdivecomputer,
where the bulk of the changes come mainly from the new ringbuffer helper
code, but there are various other small misc fixes and cleanups.
* git://git.libdivecomputer.org/libdivecomputer:
Disable the deco events
Replace the deco events with a deco sample
Report errors from the close function
Mark the private function as static
Fix a bug in the tank pressure samples
Disable freedive mode for the Uwatec Aladin Tec 2G
Mark the private function as static
Fix some compiler warnings
Fix some more null pointer dereferences
Use a more efficient download algorithm
Use the new ringbuffer stream
Add a common ringbuffer reading algorithm
Improve the robustness of the IrDA I/O code
Fix a few null pointer dereferences
Fix the number of gas mixes
Always use the sample timestamp as the base value
b04f393b97