fix enum brief description in RTF output

bug: brief description of enum member is put at the beginning of the
next list item, instead of at the end of the current list item

src/memberlist.cpp

@@ -409,7 +409,6 @@ void MemberList::writePlainDeclarations(OutputList &ol,
               {
                 ol.endDoxyAnchor(md->getOutputFileBase(),md->anchor());
               }
-              ol.endMemberItem();
               if (!md->briefDescription().isEmpty() && Config_getBool("BRIEF_MEMBER_DESC"))
               {
                 DocRoot *rootNode = validatingParseDoc(
@@ -437,6 +436,7 @@ void MemberList::writePlainDeclarations(OutputList &ol,
                 delete rootNode;
               }
               ol.endMemberDeclaration(md->anchor(),inheritId);
+              ol.endMemberItem();
             }
             md->warnIfUndocumented();
             break;