Fix some warnings about unhandled switch cases

bin/tests/test_gdscript.cpp

@@ -222,6 +222,7 @@ static String _parser_expr(const GDParser::Node *p_expr) {
 				case GDParser::OperatorNode::OP_BIT_AND: { txt=_parser_expr(c_node->arguments[0])+"&"+_parser_expr(c_node->arguments[1]); } break;;
 				case GDParser::OperatorNode::OP_BIT_OR: { txt=_parser_expr(c_node->arguments[0])+"|"+_parser_expr(c_node->arguments[1]); } break;
 				case GDParser::OperatorNode::OP_BIT_XOR: { txt=_parser_expr(c_node->arguments[0])+"^"+_parser_expr(c_node->arguments[1]); } break;
+				default: {}
 
 			}
 

core/image.cpp

@@ -2052,6 +2052,7 @@ Error Image::_decompress_bc() {
 				ht/=2;
 
 			} break;
+			default: {}
 		}
 
 	}

core/object.cpp

@@ -1581,6 +1581,7 @@ void Object::_clear_internal_resource_paths(const Variant &p_var) {
 				_clear_internal_resource_paths(d[E->get()]);
 			}
 		} break;
+		default: {}
 	}
 
 }