[gtk/matthiasc/for-master] (7 commits) ...fixed: Change coordinate apis to doubles

[Matthias Clasen <matthiasc src gnome org>]

Summary of changes:

  340a8e1... Build media backends with common_cflags and export the symb (*)
  56a6120... Merge branch 'fix-printbackend' into 'master' (*)
  f3ca814... gl renderer: Fix some off-by-one and rounding errors in the (*)
  930d779... gl renderer: don't pretend all transform nodes support bein (*)
  962c4d6... Merge branch 'matthiasc/for-master' into 'master' (*)
  e7a420c... testsuite: Re-add the sizegroups-evolution reftest
  33b836a... fixed: Change coordinate apis to doubles

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