Fix test_strconv_utf_8_next array size
@@ -210,7 +210,7 @@ test_strconv_utf_8_next() {
// Special case the "\x00" string, which is valid UTF-8 but its strlen is
// zero, not one.
- uint8_t the_nul_byte[0];
+ uint8_t the_nul_byte[1];
the_nul_byte[0] = '\x00';
struct {
