fix compatibility with phpBB 3.3.10

fix compatibility with phpBB 3.3.10 , i.e. the newer versions of twig contained in it.

Author: jbreu

styles/prosilver/template/event/overall_header_head_append.html

@@ -1,6 +1,6 @@
 <!-- IF S_REPUTATION -->
-	<!-- INCLUDECSS @pico_reputation/../theme/reputation_common.css -->
+	<!-- INCLUDECSS reputation_common.css -->
 	<!-- IF S_FORUM_REPUTATION -->
-		<!-- INCLUDECSS @pico_reputation/../theme/reputation_viewtopic.css -->
+		<!-- INCLUDECSS reputation_viewtopic.css -->
 	<!-- ENDIF -->
-<!-- ENDIF -->
+<!-- ENDIF -->