fix for FString

src/tarray.rs

@@ -15,9 +15,7 @@ pub type FString = TArray<u16>;
 
 impl ToString for FString {
     fn to_string(&self) -> String {
-        widestring::U16CStr::from_slice(&self)
-            .expect("invalid utf16 string")
-            .to_string_lossy()
+        widestring::U16Str::from_slice(&self).to_string_lossy()
     }
 }