Input: ims-pcu - fix uninitialized use of 'error' in ims_pcu_buffers_alloc()

In case allocation via usb_alloc_coherent() fails in ims_pcu_buffers_alloc(),
the function jumps to the exit path without initializing local variable
'error' that is used as return value. Detected by Coverity - CID 1016531.
Signed-off-by: Christian Engelmayer <cengelma@gmx.at>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/misc/ims-pcu.c

@@ -1566,6 +1566,7 @@ static int ims_pcu_buffers_alloc(struct ims_pcu *pcu)
 	if (!pcu->urb_ctrl_buf) {
 		dev_err(pcu->dev,
 			"Failed to allocate memory for read buffer\n");
+		error = -ENOMEM;
 		goto err_free_urb_out_buf;
 	}