LibJS: Convert to_u8() to ThrowCompletionOr

Author: https://github.com/IdanHo
Commit: 99287afc99
Pull-request: https://github.com/SerenityOS/serenity/pull/10522
Reviewed-by: https://github.com/linusg ✅

Userland/Libraries/LibJS/Runtime/Value.cpp

@@ -656,9 +656,9 @@ ThrowCompletionOr<i8> Value::to_i8(GlobalObject& global_object) const
 }
 
 // 7.1.11 ToUint8 ( argument ), https://tc39.es/ecma262/#sec-touint8
-u8 Value::to_u8(GlobalObject& global_object) const
+ThrowCompletionOr<u8> Value::to_u8(GlobalObject& global_object) const
 {
-    double value = TRY_OR_DISCARD(to_number(global_object)).as_double();
+    double value = TRY(to_number(global_object)).as_double();
     if (!isfinite(value) || value == 0)
         return 0;
     auto int_val = floor(fabs(value));