configure: simplify and improve some checks

configure: simplify and improve some checks

Simplify esd checks using function_check().

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@32261 b3059339-0415-0410-9bf9-f77b7e298cf2

Simplify OS/2 header checks using header_check_broken().

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@32263 b3059339-0415-0410-9bf9-f77b7e298cf2

Simplify libggiwmh check using function_check().

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@32264 b3059339-0415-0410-9bf9-f77b7e298cf2

Add _XOPEN_SOURCE >= 500 #define to mkstemp check; mkstemp() requires it.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@32266 b3059339-0415-0410-9bf9-f77b7e298cf2

Simplify mkstemp() check.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@32267 b3059339-0415-0410-9bf9-f77b7e298cf2

Simplify termcap check.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@32268 b3059339-0415-0410-9bf9-f77b7e298cf2

Simplify glob() check.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@32269 b3059339-0415-0410-9bf9-f77b7e298cf2

Add missing stdio.h #include to the test program in the PNG check.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@32270 b3059339-0415-0410-9bf9-f77b7e298cf2

Remove pointless sys/ioctl.h #includes from OSS audio checks.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@32271 b3059339-0415-0410-9bf9-f77b7e298cf2

Slightly restructure OSS audio check; fixes the warning:
tmp.c:2: warning: unused variable 'arg'

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@32272 b3059339-0415-0410-9bf9-f77b7e298cf2

Simplify check for external dvdread.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@32273 b3059339-0415-0410-9bf9-f77b7e298cf2

100l: Set _XOPEN_SOURCE to a proper integer value.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@32274 b3059339-0415-0410-9bf9-f77b7e298cf2