Include `mruby/endian.h` only when `MRB_NO_FLOAT` is undefined.
#include <mruby/irep.h>
#include <mruby/numeric.h>
#include <mruby/debug.h>
-#include <mruby/endian.h>
#ifndef MRB_NO_FLOAT
+#include <mruby/endian.h>
#ifdef MRB_USE_FLOAT32
#define MRB_FLOAT_FMT "%.9g"
#else
