[gimp/f17] (4 commits) ...don't crash upon deleting tags in popup (#919795)

[Nils Philippsen]

Summary of changes:

  f63ee8a... get rid of strict overflow warning (*)
  f498bea... don't have duplicate mime types in desktop file (*)
  f7a9d92... bump release (*)
  4e17aa1... don't crash upon deleting tags in popup (#919795) (*)

(*) This commit already existed in another branch; no separate mail sent