fix(ocre): include stdio used by sprintf

Signed-off-by: Marco Casaroli <marco.casaroli@gmail.com>

Author: casaroli

src/ocre/ocre.c

@@ -6,6 +6,7 @@
  */
 
 #include <string.h>
+#include <stdio.h>
 #include <errno.h>
 #include <stdlib.h>
 #include <strings.h>