generic: platform/mikrotik: fix incorrect test

The test is meant to check the result of the preceding kmalloc()

Signed-off-by: Thibaut VARÈNE <hacks@slashdirt.org>
(cherry picked from commit d0498872ff71a79f0676cfc6b6b547c499bff712)

target/linux/generic/files/drivers/platform/mikrotik/rb_hardconfig.c

@@ -495,7 +495,7 @@ static int hc_wlan_data_unpack_lzor(const u8 *inbuf, size_t inlen,
 	/* Temporary buffer same size as the outbuf */
 	templen = *outlen;
 	tempbuf = kmalloc(templen, GFP_KERNEL);
-	if (!outbuf)
+	if (!tempbuf)
 		return -ENOMEM;
 
 	/* Concatenate into the outbuf */