Fix yhirose#629 (yhirose#633)

Author: tdjisdj

libs/package_debian.sh

@@ -20,17 +20,17 @@ Description: Qt based cross-platform GUI proxy configuration manager (backend: v
 EOF
 
 cat >nekoray/DEBIAN/postinst <<-EOF
-if [ -z /usr/share/applications/nekoray.desktop ]; then
+if [ ! -s /usr/share/applications/nekoray.desktop ]; then
     cat >/usr/share/applications/nekoray.desktop<<-END
-    [Desktop Entry]
-    Name=nekoray
-    Version=$version
-    Comment=Qt based cross-platform GUI proxy configuration manager (backend: v2ray / sing-box)
-    Exec=/opt/nekoray/nekoray -appdata
-    Icon=/opt/nekoray/nekoray.png
-    Terminal=false
-    Type=Application
-    Categories=Network;Application;
+[Desktop Entry]
+Name=nekoray
+Version=$version
+Comment=Qt based cross-platform GUI proxy configuration manager (backend: v2ray / sing-box)
+Exec=/opt/nekoray/nekoray -appdata
+Icon=/opt/nekoray/nekoray.png
+Terminal=false
+Type=Application
+Categories=Network;Application;
 END
 else
     sed -i "s/^Version=.*/Version=$version/" /usr/share/applications/nekoray.desktop