fix sql engine to compile correctly

src/sql/Makefile.am

@@ -3,7 +3,7 @@ libmdbsql_la_SOURCES=	mdbsql.c parser.y lexer.l
 INCLUDES	=	-I$(top_srcdir)/include `glib-config --cflags`
 LIBS	=	`glib-config --libs`
 LDADD	=	../libmdb/libmdb.la 
-#YACC = yacc -d
+YACC = bison -y -d
 
 dist-hook:
 	rm -f $(distdir)/parser.c $(distdir)/parser.h $(distdir)/lexer.c