examples/embedding: Fix hard-coded MP_QSTR_ value.

examples/embedding/hello-embed.c

@@ -38,7 +38,7 @@ static char heap[16384];
 mp_obj_t execute_from_str(const char *str) {
     nlr_buf_t nlr;
     if (nlr_push(&nlr) == 0) {
-        qstr src_name = 0/*MP_QSTR_*/;
+        qstr src_name = 1/*MP_QSTR_*/;
         mp_lexer_t *lex = mp_lexer_new_from_str_len(src_name, str, strlen(str), false);
         mp_parse_tree_t pt = mp_parse(lex, MP_PARSE_FILE_INPUT);
         mp_obj_t module_fun = mp_compile(&pt, src_name, MP_EMIT_OPT_NONE, false);