warning fixes (string.h is required for memset)

moved config.h at the top of the include (often avoids 10L when adding a
  new #include ;)


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@6238 b3059339-0415-0410-9bf9-f77b7e298cf2

libao2/ao_pcm.c

@@ -1,7 +1,9 @@
+#include "config.h"
+
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 
-#include "config.h"
 #include "bswap.h"
 #include "afmt.h"
 #include "audio_out.h"

libao2/ao_plugin.c

@@ -1,7 +1,8 @@
+#include "../config.h"
+
 #include <stdio.h>
 #include <stdlib.h>
-
-#include "../config.h"
+#include <string.h>
 
 #include "afmt.h"
 #include "audio_out.h"

libao2/pl_delay.c

@@ -7,6 +7,7 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 
 #include "audio_out.h"
 #include "audio_plugin.h"

libao2/pl_format.c

@@ -9,6 +9,7 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <unistd.h>
 #include <inttypes.h>
 

libao2/pl_surround.c

@@ -38,6 +38,7 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <unistd.h>
 
 #include "audio_out.h"