### Godot version

4.0b16

### System information

Windows 11

### Issue description

Godot game (not the editor) crashes by loading a specific ".glb" model via `Godot.GltfDocument.AppendFromFile` (in C#, not tested in GDScript). The model is exported via Blender, and runs on Godot 4.0 Beta 15 without any problems.

```
Fatal error. System.AccessViolationException: Attempted to read or write protected memory. This is often an indication t.
   at Godot.NativeInterop.NativeFuncs.godotsharp_method_bind_ptrcall(IntPtr, IntPtr, Void**, Void*)
   at Godot.NativeCalls.godot_icall_4_467(IntPtr, IntPtr, System.String, IntPtr, UInt32, System.String)
   at Godot.GltfDocument.AppendFromFile(System.String, Godot.GltfState, UInt32, System.String)
   at dummy_scene._Ready()
   at Godot.Node.InvokeGodotClassMethod(Godot.NativeInterop.godot_string_name ByRef, Godot.NativeInterop.NativeVariantPt)
   at Godot.Node3D.InvokeGodotClassMethod(Godot.NativeInterop.godot_string_name ByRef, Godot.NativeInterop.NativeVariant)
   at dummy_scene.InvokeGodotClassMethod(Godot.NativeInterop.godot_string_name ByRef, Godot.NativeInterop.NativeVariantP)
   at Godot.Bridge.CSharpInstanceBridge.Call(IntPtr, Godot.NativeInterop.godot_string_name*, Godot.NativeInterop.godot_v)
```

![image](https://user-images.githubusercontent.com/18738917/215181154-998d84b9-247b-4e8d-a1de-9bf400a1e567.png)


### Steps to reproduce

Run the dummy scene with affected GLTF code. (See MRP.)

### Minimal reproduction project

C# proj [Godot 4 b16 GLTF Crash.zip](https://github.com/godotengine/godot/files/10522482/Godot.4.b16.GLTF.Crash.zip)

GDScript proj [Godot.4.b16.GLTF.Crash.gdscript.zip](https://github.com/godotengine/godot/files/10543553/Godot.4.b16.GLTF.Crash.gdscript.zip)

int start = uri.find(",");
	ERR_FAIL_COND_V(start == -1, Vector<uint8_t>());
	CharString substr = uri.substr(start + 1).ascii();
	int strlen = substr.length();
	Vector<uint8_t> buf;
	buf.resize(strlen / 4 * 3 + 1 + 1);
	size_t len = 0;
	ERR_FAIL_COND_V(CryptoCore::b64_decode(buf.ptrw(), buf.size(), &len, (unsigned char *)substr.get_data(), strlen) != OK, Vector<uint8_t>());
	buf.resize(len);
	return buf;
}
Error GLTFDocument::_encode_buffer_glb(Ref<GLTFState> p_state, const String &p_path) {
	print_verbose("glTF: Total buffers: " + itos(p_state->buffers.size()));
	if (!p_state->buffers.size()) {
		return OK;
	}