Fixed reachable leaks.

Refs #818 @30m

src/zcompile/zcompile.c

@@ -1820,6 +1820,7 @@ int zone_read(const char *name, const char *zonefile, const char *outfile,
 
 	debug_zp("zone parsed\n");
 
+
 	uint found_orphans;
 
 	found_orphans = find_rrsets_orphans(parser->current_zone,

src/zcompile/zcompile.h

@@ -56,6 +56,8 @@ struct lex_data {
 
 #define DEFAULT_TTL 3600
 
+int yylex_destroy();
+
 /*! \todo Implement ZoneDB. */
 typedef void namedb_type;
 

src/zcompile/zparser.y

@@ -1449,6 +1449,7 @@ void zparser_free()
 	dnslib_dname_free(&(parser->root_domain));
 	free(parser->temporary_items);
 	dnslib_rrset_free(&(parser->current_rrset));
+	yylex_destroy();
 	free(parser);
 }