Blackfin: kgdb_test: make sure to initialize num2

We check its value at runtime, so we want to avoid garbage across runs.
Signed-off-by: Vivi Li <vivi.li@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

arch/blackfin/kernel/kgdb_test.c

@@ -95,6 +95,10 @@ static int __init kgdbtest_init(void)
 {
 	struct proc_dir_entry *entry;
 
+#if L2_LENGTH
+	num2 = 0;
+#endif
+
 	entry = proc_create("kgdbtest", 0, NULL, &kgdb_test_proc_fops);
 	if (entry == NULL)
 		return -ENOMEM;