configure: add return_check and return_statement_check helpers
cosmetics: Move header_check helper function.
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@32803 b3059339-0415-0410-9bf9-f77b7e298cf2
Add return_check() helper function and use it to simplify some checks.
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@32805 b3059339-0415-0410-9bf9-f77b7e298cf2
Add return_statement_check() helper function and use it to simplify some checks.
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@32806 b3059339-0415-0410-9bf9-f77b7e298cf2