wpsoffice-cn: fix et/wpp/wpspdf failure to launch with no mode configured

* close #459415

pkgs/by-name/wp/wpsoffice-cn/package.nix

@@ -139,6 +139,11 @@ stdenv.mkDerivation {
     # libmysqlclient dependency
     patchelf --replace-needed libmysqlclient.so.18 libmysqlclient.so $out/opt/kingsoft/wps-office/office6/libFontWatermark.so
     patchelf --add-rpath ${libmysqlclient}/lib/mariadb $out/opt/kingsoft/wps-office/office6/libFontWatermark.so
+    # fix et/wpp/wpspdf failure to launch with no mode configured
+    for i in $out/bin/*; do
+      substituteInPlace $i \
+        --replace-fail '[ $haveConf -eq 1 ] &&' '[ ! $currentMode ] ||'
+    done
   '';
 
   passthru.updateScript = ./update.sh;