fix: don't include print styles if pdf.less exists

Author: micgro42

action.php

@@ -785,7 +785,7 @@ protected function css_pluginPDFstyles() {
             $list[DOKU_PLUGIN . "$p/all.css"] = DOKU_BASE . "lib/plugins/$p/";
             $list[DOKU_PLUGIN . "$p/all.less"] = DOKU_BASE . "lib/plugins/$p/";
 
-            if(file_exists(DOKU_PLUGIN . "$p/pdf.css")) {
+            if(file_exists(DOKU_PLUGIN . "$p/pdf.css") || file_exists(DOKU_PLUGIN . "$p/pdf.less")) {
                 $list[DOKU_PLUGIN . "$p/pdf.css"] = DOKU_BASE . "lib/plugins/$p/";
                 $list[DOKU_PLUGIN . "$p/pdf.less"] = DOKU_BASE . "lib/plugins/$p/";
             } else {