parser: fix multi fixed arrays init (#7996)

vlib/builtin/array_test.v

@@ -1305,3 +1305,8 @@ fn test_array_of_map_insert() {
 	println(x)
 	assert '$x' == "[{}, {}, {'123': 123}, {}]"
 }
+
+fn test_multi_fixed_array_init() {
+	a := [3][3]int{}
+	assert '$a' == '[[0, 0, 0], [0, 0, 0], [0, 0, 0]]'
+}

vlib/v/parser/containers.v

@@ -54,7 +54,7 @@ fn (mut p Parser) array_init() ast.ArrayInit {
 		}
 		last_pos = p.tok.position()
 		p.check(.rsbr)
-		if exprs.len == 1 && p.tok.kind in [.name, .amp] && p.tok.line_nr == line_nr {
+		if exprs.len == 1 && p.tok.kind in [.name, .amp, .lsbr] && p.tok.line_nr == line_nr {
 			// [100]byte
 			elem_type = p.parse_type()
 			is_fixed = true