extmod/modubinascii: Only include uzlib/tinf.h when it's really needed.

Author: dpgeorge

extmod/modubinascii.c

@@ -33,8 +33,6 @@
 #include "py/binary.h"
 #include "extmod/modubinascii.h"
 
-#include "uzlib/tinf.h"
-
 mp_obj_t mod_binascii_hexlify(size_t n_args, const mp_obj_t *args) {
     // Second argument is for an extension to allow a separator to be used
     // between values.
@@ -221,6 +219,8 @@ mp_obj_t mod_binascii_b2a_base64(mp_obj_t data) {
 MP_DEFINE_CONST_FUN_OBJ_1(mod_binascii_b2a_base64_obj, mod_binascii_b2a_base64);
 
 #if MICROPY_PY_UBINASCII_CRC32
+#include "uzlib/tinf.h"
+
 mp_obj_t mod_binascii_crc32(size_t n_args, const mp_obj_t *args) {
     mp_buffer_info_t bufinfo;
     mp_get_buffer_raise(args[0], &bufinfo, MP_BUFFER_READ);