fix zero_and_clear

sub/core/src/arrays.rs

@@ -57,17 +57,20 @@ impl<const MAX_LEN: usize, T: Sized> FixedVec<MAX_LEN, T> {
         unsafe { core::slice::from_raw_parts_mut(self.buffer.as_mut_ptr() as *mut T, self.length) }
     }
 
-    pub fn zero_and_clear(&mut self) {
-        self.as_slice_mut().fill(0);
-        self.length = 0;
-    }
-
     pub fn clear(&mut self) {
         self.length = 0;
     }
 
 }
 
+impl<const MAX_LEN: usize> FixedVec<MAX_LEN, u8> {
+    pub fn zero_and_clear(&mut self) {
+        self.as_slice_mut().fill(0);
+        self.length = 0;
+    }
+}
+
+
 impl<const MAX_LEN: usize, T: Debug> Debug for FixedVec<MAX_LEN, T> {
     fn fmt(&self, f: &mut Formatter<'_>) -> core::fmt::Result {
         Debug::fmt(self.as_slice(), f)