Make softfloat test program compile again: Setting the av_log_level variable

needs to be replaced by a call to av_log_set_level().

Originally committed as revision 18056 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavutil/softfloat.c

@@ -32,7 +32,7 @@ int main(void){
     SoftFloat sf1, sf2;
     double d1, d2;
     int i, j;
-av_log_level = AV_LOG_DEBUG;
+    av_log_set_level(AV_LOG_DEBUG);
 
     d1= 1;
     for(i= 0; i<10; i++){