### 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
if (tk.type == TK_CF_CASE) {
							_set_error(RTR("Cases must be defined before default case."));
							return ERR_PARSE_ERROR;
						} else if (prev_type == TK_CF_DEFAULT) {
							_set_error(RTR("Default case must be defined only once."));
							return ERR_PARSE_ERROR;
						}
					}
					prev_type = tk.type;
					_set_tkpos(pos);
					continue;
				} else {
					HashSet<int> constants;
					for (int i = 0; i < switch_block->statements.size(); i++) { 
						ControlFlowNode *flow = static_cast<ControlFlowNode *>(switch_block->statements[i]);
						if (flow) {
							if (flow->flow_op == FLOW_OP_CASE) {
								if (flow->expressions[0]->type == Node::NODE_TYPE_CONSTANT) {
									ConstantNode *cn = static_cast<ConstantNode *>(flow->expressions[0]);
									if (!cn || cn->values.is_empty()) {
										return ERR_PARSE_ERROR;
									}
									if (constants.has(cn->values[0].sint)) {
										_set_error(vformat(RTR("Duplicated case label: %d."), cn->values[0].sint));
										return ERR_PARSE_ERROR;
									}
									constants.insert(cn->values[0].sint);
								} else if (flow->expressions[0]->type == Node::NODE_TYPE_VARIABLE) {
									VariableNode *vn = static_cast<VariableNode *>(flow->expressions[0]);
									if (!vn) {