Revert #undefining system functions, it is not necessary.

git-svn-id: file:///var/local/repositories/mplayer/trunk/libswscale@28502 b3059339-0415-0410-9bf9-f77b7e298cf2

swscale-example.c

@@ -30,13 +30,6 @@
 #include "swscale.h"
 #include "swscale_internal.h"
 
-#undef fprintf
-#undef free
-#undef malloc
-#undef perror
-#undef printf
-#undef random
-
 static uint64_t getSSD(uint8_t *src1, uint8_t *src2, int stride1, int stride2, int w, int h){
     int x,y;
     uint64_t ssd=0;