Fix format strings.

Index: libdieharder/bits.c
--- libdieharder/bits.c.orig
+++ libdieharder/bits.c
@@ -1176,7 +1176,7 @@ void get_rand_bits(void *result,unsigned int rsize,uns
  output = (char *)&bits_output[BRBUF]-rsize;
  resultp = (char *)result;
  MYDEBUG(D_BITS) {
-   printf("rsize = %d  output address = %p result address = %p\n",rsize,output,resultp);
+   printf("rsize = %d  output address = %s result address = %s\n",rsize,output,resultp);
  }
 
  /* copy them over characterwise */