Remove %n format specifier
and stop using the platform-dependent function binfmtl().
We want 32 bits here, not whatever sizeof(long) might be.

Index: ExplicateUTF8.c
--- ExplicateUTF8.c.orig
+++ ExplicateUTF8.c
@@ -87,7 +87,7 @@ main(int ac, char **av){
   int UsefulBits;
   unsigned char c[6];
   int i;
-  UTF32 ch;
+  UTF32 ch, mask;
   unsigned char *cptr;
   unsigned char ShiftedByte;
   char tempstr[33];
@@ -214,7 +214,10 @@ main(int ac, char **av){
     printf("%s ",tempstr); 
   }
   printf("\n");
-  printf("This is padded to 32 places with %d zeros: %n%s\n",(32-GotBits),&spaces,binfmtl(ch));
+  spaces = printf("This is padded to 32 places with %d zeros: ",(32-GotBits));
+  for (mask = 1UL << 31; mask; mask >>= 1)
+    putchar(ch & mask ? '1' : '0');
+  putchar('\n');
   sprintf(tempstr,"                                ");
   sprintf(tempstr,"%08lX",ch);
   tempstr[28] = tempstr[7];