[ccextractor-users] Migration to pure C

[Carlos F. S. <ca...@cc...>]

After some pain all files are now .c and they seem to build in both
GNU and Visual Studio.

Lots of files needed to be changed because of Visual Studio using C89
for .c files (so variables needs to be declared on top and things like
that).

Hopefully we (mostly Anshul and myself) didn't break anything in the
process, but please test.

Willem, if you could do a complete test run to compare 0.69 with my
current git it would help a lot to confirm we are still OK. No need
for a fancy report, just a simple "all identical" or "this is fucked"
will do (note: the test should compare several file formats, not just
srt).

If nothing is broken I'll ask Helen Huus (who did the spupng
implementation) to check it out (since libpng was updated, the C++
part of the code were changed and so on) and if she says everything is
OK I'll release this as 0.70 so we have again a stable code base to
continue working on.