added parameterless constructor for struct MoveBuffer

engine/src/bitboard/movebuffer.rs

@@ -4,4 +4,14 @@ pub struct MoveBuffer {
 
   buffer: [BitMove; 256],
   count: usize
+}
+
+impl MoveBuffer {
+
+  pub fn new() -> Self {
+    return Self {
+      buffer: [BitMove::quiet(0, 0, None); 256],
+      count: 0
+    };
+  }
 }