Make the selftesting code use and compileable.

Originally committed as revision 14433 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavutil/random.c

@@ -28,9 +28,7 @@ see http://en.wikipedia.org/wiki/Mersenne_twister for an explanation of this alg
 #include <stdio.h>
 #include "random.h"
 
-//#define DEBUG
-
-#ifdef DEBUG
+#ifdef TEST
 #include "common.h"
 #include "log.h"
 #endif
@@ -81,8 +79,8 @@ void av_random_generate_untempered_numbers(AVRandomState *state)
     state->index = 0;
 }
 
-#ifdef DEBUG
-void av_benchmark_random(void)
+#ifdef TEST
+void main(void)
 {
     int x=0;
     int i, j;

libavutil/random.h

@@ -63,7 +63,4 @@ static inline double av_random_real1(AVRandomState *state)
     return av_random(state) * (1.0 / 4294967296.0);
 }
 
-// only available if DEBUG is defined in the .c file
-void av_benchmark_random(void);
-
 #endif /* FFMPEG_RANDOM_H */