wireless config gets regenerated not only when it does not exist, buit also if it is 0 len
wireless config gets regenerated not only when it does not exist, buit also if it is 0 len

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@8149 3c298f89-4303-0410-b956-a3cf2f4a3e73

--- a/package/base-files/files/etc/init.d/network
+++ b/package/base-files/files/etc/init.d/network
@@ -9,7 +9,7 @@
 
 	include /lib/network
 	setup_switch
-	[ -e /etc/config/wireless ] || \
+	[ -s /etc/config/wireless ] || \
 		/sbin/wifi detect > /etc/config/wireless
 	/sbin/wifi up
 }

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