Spell out the type of the result from map_pass_err.

Without these changes, rust-analyzer cannot determine the type of
`cmd_buf`.

wgpu-core/src/command/compute.rs

@@ -309,7 +309,9 @@ impl<G: GlobalIdentityHandlerFactory> Global<G> {
  let (device_guard, mut token) = hub.devices.read(&mut token);
 
  let (mut cmd_buf_guard, mut token) = hub.command_buffers.write(&mut token);
- let cmd_buf = CommandBuffer::get_encoder_mut(&mut *cmd_buf_guard, encoder_id)
+ // Spell out the type, to placate rust-analyzer.
+ // https://github.com/rust-lang/rust-analyzer/issues/12247
+ let cmd_buf: &mut CommandBuffer<A> = CommandBuffer::get_encoder_mut(&mut *cmd_buf_guard, encoder_id)
  .map_pass_err(init_scope)?;
  // will be reset to true if recording is done without errors
  cmd_buf.status = CommandEncoderStatus::Error;

wgpu-core/src/command/render.rs

@@ -1050,7 +1050,9 @@ impl<G: GlobalIdentityHandlerFactory> Global<G> {
  let (trackers, query_reset_state, pending_discard_init_fixups) = {
  let (mut cmb_guard, mut token) = hub.command_buffers.write(&mut token);
 
- let cmd_buf = CommandBuffer::get_encoder_mut(&mut *cmb_guard, encoder_id)
+ // Spell out the type, to placate rust-analyzer.
+ // https://github.com/rust-lang/rust-analyzer/issues/12247
+ let cmd_buf: &mut CommandBuffer<A> = CommandBuffer::get_encoder_mut(&mut *cmb_guard, encoder_id)
  .map_pass_err(init_scope)?;
  // close everything while the new command encoder is filled
  cmd_buf.encoder.close();