[PATCH] drivers/net/wireless/airo.c unsigned comparason

fid is declared as a u32 (unsigned int), and then a few lines later, it is checked for a value < 0, which is clearly useless.
In the two locations this function is used, in one it is *explicitly* given a negative number, which would be ignored with the
current definition.

Thanks to LinuxICC (http://linuxicc.sf.net).

Signed-off-by: Gabriel A. Devenyi <ace@staticwave.ca>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
diff --git a/drivers/net/wireless/airo.c b/drivers/net/wireless/airo.c
index 750c016..849ac88 100644
--- a/drivers/net/wireless/airo.c
+++ b/drivers/net/wireless/airo.c
@@ -2040,7 +2040,7 @@
 	return 1;
 }
 
-static void get_tx_error(struct airo_info *ai, u32 fid)
+static void get_tx_error(struct airo_info *ai, s32 fid)
 {
 	u16 status;