[easytag] (12 commits) Non-fast-forward update to branch wip/ax-compile-warnings

[David King <davidk src gnome org>]

The branch 'wip/ax-compile-warnings' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  5cd0ec9... Remove redundant declaration
  7984f7a... Add missing default cases in switch statements
  aa3c8bf... Avoid shadowed variable warnings
  13793d5... Avoid unhandled switch cases warning
  edad670... Avoid old-style function declaration
  cd3d165... Fix sign comparison warnings
  a89de7b... Fix const correctness warnings
  72b4d39... Handle OptimFrog files as if they are unknown
  b0701f5... Remove redundant comparison
  4b06314... Port to AX_COMPILER_FLAGS
  a5e4a9c... Fix compilation of misc test

Commits added to the branch:

  65435b7... Fix compilation of misc test
  91e48e8... Handle OptimFrog files as if they are unknown
  2db55ba... Remove redundant declaration
  0a6d022... Add missing default cases in switch statements
  27f659f... Avoid shadowed variable warnings
  765d54b... Avoid unhandled switch cases warning
  eefc886... Avoid old-style function declaration
  c474348... Fix sign comparison warnings
  769dec5... Fix const correctness warnings
  10ec8bf... Remove redundant comparison
  93774c3... Port to AX_COMPILER_FLAGS
  845eb67... Use AX_IS_RELEASE to control compiler warnings