py/emitglue: When assigning bytecode only pass bytecode len if needed.

Most embedded targets will have this bit of the code disabled, saving a
small amount of code space.

py/emitbc.c

@@ -437,7 +437,9 @@ void mp_emit_bc_end_pass(emit_t *emit) {
 
     } else if (emit->pass == MP_PASS_EMIT) {
         mp_emit_glue_assign_bytecode(emit->scope->raw_code, emit->code_base,
+            #if MICROPY_PERSISTENT_CODE_SAVE || MICROPY_DEBUG_PRINTERS
             emit->code_info_size + emit->bytecode_size,
+            #endif
             emit->const_table,
             #if MICROPY_PERSISTENT_CODE_SAVE
             emit->ct_cur_obj, emit->ct_cur_raw_code,

py/emitglue.c

@@ -55,7 +55,10 @@ mp_raw_code_t *mp_emit_glue_new_raw_code(void) {
     return rc;
 }
 
-void mp_emit_glue_assign_bytecode(mp_raw_code_t *rc, const byte *code, mp_uint_t len,
+void mp_emit_glue_assign_bytecode(mp_raw_code_t *rc, const byte *code,
+    #if MICROPY_PERSISTENT_CODE_SAVE || MICROPY_DEBUG_PRINTERS
+    size_t len,
+    #endif
     const mp_uint_t *const_table,
     #if MICROPY_PERSISTENT_CODE_SAVE
     uint16_t n_obj, uint16_t n_raw_code,

py/emitglue.h

@@ -63,7 +63,10 @@ typedef struct _mp_raw_code_t {
 
 mp_raw_code_t *mp_emit_glue_new_raw_code(void);
 
-void mp_emit_glue_assign_bytecode(mp_raw_code_t *rc, const byte *code, mp_uint_t len,
+void mp_emit_glue_assign_bytecode(mp_raw_code_t *rc, const byte *code,
+    #if MICROPY_PERSISTENT_CODE_SAVE || MICROPY_DEBUG_PRINTERS
+    size_t len,
+    #endif
     const mp_uint_t *const_table,
     #if MICROPY_PERSISTENT_CODE_SAVE
     uint16_t n_obj, uint16_t n_raw_code,

py/persistentcode.c

@@ -200,7 +200,11 @@ STATIC mp_raw_code_t *load_raw_code(mp_reader_t *reader) {
 
     // create raw_code and return it
     mp_raw_code_t *rc = mp_emit_glue_new_raw_code();
-    mp_emit_glue_assign_bytecode(rc, bytecode, bc_len, const_table,
+    mp_emit_glue_assign_bytecode(rc, bytecode,
+        #if MICROPY_PERSISTENT_CODE_SAVE || MICROPY_DEBUG_PRINTERS
+        bc_len,
+        #endif
+        const_table,
         #if MICROPY_PERSISTENT_CODE_SAVE
         n_obj, n_raw_code,
         #endif