swab() needs _XOPEN_SOURCE to be defined.

Fixes two implicit declaration warnings.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@28455 b3059339-0415-0410-9bf9-f77b7e298cf2

configure

@@ -3564,6 +3564,7 @@ echores "$_vsscanf"
 
 echocheck "swab()"
 cat > $TMPC << EOF
+#define _XOPEN_SOURCE
 #include <unistd.h>
 int main(void) { swab(0, 0, 0); return 0; }
 EOF

libmpcodecs/ad_hwac3.c

@@ -5,6 +5,7 @@
    (see http://www.dtek.chalmers.se/~dvd/)
 */
 
+#define _XOPEN_SOURCE
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>

libmpcodecs/ad_liba52.c

@@ -1,3 +1,4 @@
+#define _XOPEN_SOURCE
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>