[PATCH] iwlwifi: fix build warning

[Wu Fengguang <fengguang.wu@intel.com>]

iwl_escape_essid() is only used in debugging code for now.
So define it only with CONFIG_IWL3945_DEBUG enabled.

Signed-off-by: Wu Fengguang <wfg@linux.intel.com>
---
diff --git a/drivers/net/wireless/iwlwifi/iwl-scan.c b/drivers/net/wireless/iwlwifi/iwl-scan.c
index c89365e..412f5d2 100644
--- a/drivers/net/wireless/iwlwifi/iwl-scan.c
+++ b/drivers/net/wireless/iwlwifi/iwl-scan.c
@@ -70,6 +70,7 @@ static int scan_tx_ant[3] = {
 
 
 
+#ifdef CONFIG_IWL3945_DEBUG
 static int iwl_is_empty_essid(const char *essid, int essid_len)
 {
 	/* Single white space is for Linksys APs */
@@ -111,6 +112,7 @@ static const char *iwl_escape_essid(const char *essid, u8 essid_len)
 	*d = '\0';
 	return escaped;
 }
+#endif
 
 /**
  * iwl_scan_cancel - Cancel any currently executing HW scan