make sure scanner and parser both check BOM

vlib/v/parser/parser.v

@@ -65,13 +65,9 @@ pub fn parse_stmt(text string, table &table.Table, scope &ast.Scope) ast.Stmt {
 }
 
 pub fn parse_file(path string, table &table.Table) ast.File {
-	// println('parse_file("$path")')
-	text := os.read_file(path) or {
-		panic(err)
-	}
 	mut stmts := []ast.Stmt
 	mut p := Parser{
-		scanner: scanner.new_scanner(text)
+		scanner: scanner.new_scanner_file(path)
 		table: table
 		file_name: path
 		pref: &pref.Preferences{}

vlib/v/scanner/scanner.v

@@ -43,7 +43,7 @@ mut:
 	// string values when generating formatted code.
 }
 // new scanner from file.
-fn new_scanner_file(file_path string) &Scanner {
+pub fn new_scanner_file(file_path string) &Scanner {
 	if !os.exists(file_path) {
 		verror("$file_path doesn't exist")
 	}