discover/grub2: Fix uninitialised yylineno

Valgrind reports an invalid usage of an uninitialised var in yyerror,
causing testcase failures.

Initialise lineno before we start parsing.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/discover/grub2/parser.y b/discover/grub2/parser.y
index 8ab17a6..a3473ca 100644
--- a/discover/grub2/parser.y
+++ b/discover/grub2/parser.y
@@ -309,6 +309,7 @@ void grub2_parser_parse(struct grub2_parser *parser, char *buf, int len)
 	int rc;
 
 	bufstate = yy_scan_bytes(buf, len - 1, parser->scanner);
+	yyset_lineno(1, parser->scanner);
 
 	rc = yyparse(parser);