### Godot version

4.0.3

### System information

Win7

### Issue description

![image](https://github.com/godotengine/godot/assets/28286958/abec9d3c-e078-424c-9430-d9fe8897aad6)


### Steps to reproduce

1. Create shader
2. Add uint with hex, e.g. 0xffffu

### Minimal reproduction project

N/A
lut_case = CASE_HEXA_PERIOD;
								} else if (symbol == 'e' && !hexa_found) {
									exponent_found = true;
									lut_case = CASE_EXPONENT;
								} else if (symbol == 'f' && !hexa_found) {
									if (!period_found && !exponent_found) {
										error = true;
									}
									float_suffix_found = true;
									end_suffix_found = true;
									lut_case = CASE_NONE;
								} else if (symbol == 'u') {
									uint_suffix_found = true;
									end_suffix_found = true;
									lut_case = CASE_NONE;
								} else if (symbol == '-' || symbol == '+') {
									if (exponent_found) {
										lut_case = CASE_SIGN_AFTER_EXPONENT;
									} else {
										break;
									}
								}
							} else if (!hexa_found || !is_hex_digit(symbol)) {
								if (is_ascii_identifier_char(symbol)) {
									error = true;
								} else {
									break;
								}
							}
						}