[ATM]: [ambassador] Change the return type to reflect reality

Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Chas Williams <chas@cmf.nrl.navy.mil>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/atm/ambassador.c b/drivers/atm/ambassador.c
index 4521a24..da599e6 100644
--- a/drivers/atm/ambassador.c
+++ b/drivers/atm/ambassador.c
@@ -915,8 +915,8 @@
 
 /********** make rate (not quite as much fun as Horizon) **********/
 
-static unsigned int make_rate (unsigned int rate, rounding r,
-			       u16 * bits, unsigned int * actual) {
+static int make_rate (unsigned int rate, rounding r,
+		      u16 * bits, unsigned int * actual) {
   unsigned char exp = -1; // hush gcc
   unsigned int man = -1;  // hush gcc