Cleanup: Silence missing switch case warning

Referenced by commit 72e81a45c4, Extern: Add modifications diff for TinyGLTF

extern/tinygltf/README.blender

@@ -2,4 +2,5 @@ Project: TinyGLTF
 URL: https://github.com/syoyo/tinygltf
 License: MIT
 Upstream version: 2.5.0, 19a41d20ec0
-Local modifications: None
+Local modifications: 
+* Silence "enum value not handled in switch" warnings due to JSON dependency.

extern/tinygltf/tiny_gltf.h

@@ -3201,6 +3201,7 @@ static bool ParseJsonAsValue(Value *ret, const json &o) {
       val = Value(o.get<double>());
       break;
     case json::value_t::null:
+    case json::value_t::binary:
     case json::value_t::discarded:
       // default:
       break;