staging: rtl8188eu: add spaces around '-' in rtw_cmd.c

Add spaces around '-' to follow kernel coding style.
Reported by checkpatch.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/core/rtw_cmd.c

@@ -405,8 +405,8 @@ u8 rtw_joinbss_cmd(struct adapter  *padapter, struct wlan_network *pnetwork)
 
 	psecuritypriv->authenticator_ie[0] = (unsigned char)psecnetwork->ie_length;
 
-	if ((psecnetwork->ie_length-12) < 255)
-		memcpy(&psecuritypriv->authenticator_ie[1], &psecnetwork->ies[12], psecnetwork->ie_length-12);
+	if ((psecnetwork->ie_length - 12) < 255)
+		memcpy(&psecuritypriv->authenticator_ie[1], &psecnetwork->ies[12], psecnetwork->ie_length - 12);
 	else
 		memcpy(&psecuritypriv->authenticator_ie[1], &psecnetwork->ies[12], 255);