atm: fore200e.c: Cleaning up uninitialized variables

There is a risk that the variable will be used without being initialized.

This was largely found by using a static code analysis program called cppcheck.
Signed-off-by: NRickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/atm/fore200e.c

@@ -2780,7 +2780,7 @@ static struct pci_driver fore200e_pca_driver = {
 
 static int __init fore200e_module_init(void)
 {
-	int err;
+	int err = 0;
 
 	printk(FORE200E "FORE Systems 200E-series ATM driver - version " FORE200E_VERSION "\n");