Fix clippy warnings

src/vtab/array.rs

@@ -157,7 +157,7 @@ impl ArrayTabCursor<'_> {
 unsafe impl VTabCursor for ArrayTabCursor<'_> {
     fn filter(&mut self, idx_num: c_int, _idx_str: Option<&str>, args: &Values<'_>) -> Result<()> {
         if idx_num > 0 {
-            self.ptr = args.get_array(0)?;
+            self.ptr = args.get_array(0);
         } else {
             self.ptr = None;
         }

src/vtab/mod.rs

@@ -571,19 +571,19 @@ impl Values<'_> {
     // `sqlite3_value_type` returns `SQLITE_NULL` for pointer.
     // So it seems not possible to enhance `ValueRef::from_value`.
     #[cfg(feature = "array")]
-    fn get_array(&self, idx: usize) -> Result<Option<array::Array>> {
+    fn get_array(&self, idx: usize) -> Option<array::Array> {
         use crate::types::Value;
         let arg = self.args[idx];
         let ptr = unsafe { ffi::sqlite3_value_pointer(arg, array::ARRAY_TYPE) };
         if ptr.is_null() {
-            Ok(None)
+            None
         } else {
-            Ok(Some(unsafe {
+            Some(unsafe {
                 let rc = array::Array::from_raw(ptr as *const Vec<Value>);
                 let array = rc.clone();
                 array::Array::into_raw(rc); // don't consume it
                 array
-            }))
+            })
         }
     }