fix linux runtime failure to load mailnews

mailnews/base/search/src/nsMsgSearchNews.h

@@ -35,7 +35,7 @@ public:
 
 	NS_IMETHOD ValidateTerms ();
 	NS_IMETHOD Search ();
-	NS_IMETHOD GetEncoding (char **result);
+//	NS_IMETHOD GetEncoding (char **result);
 
 	virtual nsresult Encode (nsCString *outEncoding);
 	virtual char *EncodeTerm (nsMsgSearchTerm *);