parser: fix `(x mut &X)`

vlib/v/parser/fn.v

@@ -29,7 +29,7 @@ pub fn (p mut Parser) call_expr(is_c bool, mod string) ast.CallExpr {
 		name: fn_name
 		args: args
 		// tok: tok
-		
+
 		pos: tok.position()
 		is_c: is_c
 		or_block: ast.OrExpr{
@@ -188,7 +188,7 @@ fn (p mut Parser) fn_args() ([]table.Arg,bool) {
 	// `int, int, string` (no names, just types)
 	types_only := p.tok.kind in [.amp, .and] || (p.peek_tok.kind == .comma && p.table.known_type(p.tok.lit)) || p.peek_tok.kind == .rpar
 	if types_only {
-		// p.warn('types only')
+		//p.warn('types only')
 		mut arg_no := 1
 		for p.tok.kind != .rpar {
 			arg_name := 'arg_$arg_no'

vlib/v/parser/parse_type.v

@@ -93,8 +93,12 @@ pub fn (p mut Parser) parse_type() table.Type {
 		p.next()
 		is_optional = true
 	}
-	// &Type
 	mut nr_muls := 0
+	if p.tok.kind == .key_mut {
+		nr_muls++
+		p.next()
+	}
+	// &Type
 	for p.tok.kind in [.and, .amp] {
 		if p.tok.kind == .and {
 			nr_muls += 2
@@ -104,10 +108,6 @@ pub fn (p mut Parser) parse_type() table.Type {
 		}
 		p.next()
 	}
-	if p.tok.kind == .key_mut {
-		nr_muls++
-		p.next()
-	}
 	is_c := p.tok.lit == 'C'
 	if is_c {
 		p.next()