Testing code uses random().

Originally committed as revision 14804 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavutil/pca.c

@@ -152,6 +152,7 @@ int ff_pca(PCA *pca, double *eigenvector, double *eigenvalue){
 #if 1
 
 #undef printf
+#undef random
 #include <stdio.h>
 #include <stdlib.h>