cochran.c: make cochran_predive_event_bytes() return 0

It seems that an iteration will happen even if the function
returns 0, but this looks like a non-breaking change.

Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

cochran.c

@@ -285,6 +285,8 @@ static int cochran_predive_event_bytes(unsigned char code)
 		return emc_event_bytes[x][1];
 		break;
 	}
+
+	return 0;
 }
 
 int cochran_dive_event_bytes(unsigned char event)