cosmetics: Move all #includes together at the beginning of the file.

Originally committed as revision 16862 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavutil/internal.h

@@ -34,6 +34,7 @@
 #include <stdint.h>
 #include <stddef.h>
 #include <assert.h>
+#include "config.h"
 #include "common.h"
 #include "timer.h"
 
@@ -97,8 +98,6 @@
 #    define PIC
 #endif
 
-#include "config.h"
-
 #ifndef offsetof
 #    define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F))
 #endif