array: fix initialization of empty fixed size arrays

compiler/gen_c.v

@@ -59,7 +59,9 @@ fn (p mut Parser) gen_var_decl(name string, is_static bool) string {
 		initializer := p.cgen.cur_line.right(pos)
 		if initializer.len > 0 {
 			p.cgen.resetln(' = {' + initializer.all_after('{') )
-		}
+		} else if initializer.len == 0 {
+			p.cgen.resetln(' = { 0 }')
+		}	
 	}
 
 	if is_static {

vlib/builtin/array_test.v

@@ -164,7 +164,6 @@ const (
 )
 
 fn test_fixed() {
-	/*
 	mut nums := [4]int
 	assert nums[0] == 0
 	assert nums[1] == 0
@@ -174,7 +173,6 @@ fn test_fixed() {
 	assert nums[1] == 7
 	nums2 := [N]int
 	assert nums2[N - 1] == 0
-	*/
 }
 
 fn modify (numbers mut []int) {
@@ -286,7 +284,7 @@ fn test_multi() {
 	// TODO
 	//b :=  [ [[1,2,3],[4,5,6]], [[1,2]] ]
 	//assert b[0][0][0] == 1
-} 
+}
 
 fn test_in() {
 	a := [1,2,3]
@@ -295,7 +293,7 @@ fn test_in() {
 	assert 3 in a
 	assert !(4 in a)
 	assert !(0 in a)
-} 
+}
 
 fn callback_1(val int, index int, arr []int) bool {
 	return val >= 2