### 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 (identifier == StringName()) {
					_set_error(RTR("Expected an identifier as a member."));
					return nullptr;
				}
				String ident = identifier;
				bool ok = true;
				bool repeated = false;
				DataType member_type = TYPE_VOID;
				StringName member_struct_name = "";
				int array_size = 0;
				RBSet<char> position_symbols;
				RBSet<char> color_symbols;
				RBSet<char> texture_symbols;
				bool mix_error = false;
				switch (dt) {
					case TYPE_STRUCT: {
						ok = false;
						String member_name = String(ident.ptr());
						if (shader->structs.has(st)) {
							StructNode *n = shader->structs[st].shader_struct;
							for (const MemberNode *E : n->members) {
								if (String(E->name) == member_name) {
									member_type = E->datatype;
									array_size = E->array_size;
									if (member_type == TYPE_STRUCT) {
										member_struct_name = E->struct_name;
									}
									ok = true;
									break;
								}