fix a few warnings

Good find, @eyelash .

vlib/freetype/freetype.v

@@ -4,13 +4,11 @@
 
 module freetype
 
-import (
-	os
-	gx
-	gg
-	glm
-	gl
-)
+import os
+import gx
+import gg
+import glm
+import gl
 
 #flag windows -I @VROOT/thirdparty/freetype/include
 #flag windows -L @VROOT/thirdparty/freetype/win64
@@ -223,7 +221,7 @@ pub fn new_context(cfg gg.Cfg) &FreeType {
 	C.glPixelStorei(C.GL_UNPACK_ALIGNMENT, 1)
 	// Gen texture
 	// Load first 128 characters of ASCII set
-	mut chars := []Character
+	mut chars := []Character{}
 	for c in 0..128 {
 		ch := ft_load_char(face, i64(c))
 		// s := utf32_to_str(uint(0x043f))
@@ -454,7 +452,7 @@ pub fn (f FT_Face) str() string {
 */
 
 pub fn (ac []Character) str() string {
-	mut res := []string
+	mut res := []string{}
 	for c in ac {
 		res << '  Character{ code: $c.code , texture_id: $c.texture_id }'
 	}

vlib/gg/gg.v

@@ -4,14 +4,12 @@
 
 module gg
 
-import (
-	stbi
-	glm
-	gl
-	gx
-	os
-	glfw
-)
+import stbi
+import glm
+import gl
+import gx
+import os
+import glfw
 
 pub struct Vec2 {
 pub:
@@ -434,7 +432,7 @@ pub fn (ctx &GG) draw_filled_arc(x, y, r, start_angle, end_angle f32, segments i
 	ctx.use_color_shader(color)
 
 	
-	mut vertices := []f32
+	mut vertices := []f32{}
 	vertices << [x, y] !
 	vertices << arc_vertices(x, y, r, start_angle, end_angle, segments)
 	ctx.bind_vertices(vertices)
@@ -448,7 +446,7 @@ pub fn (ctx &GG) draw_circle(x, y, r f32, color gx.Color) {
 
 pub fn (ctx &GG) draw_rounded_rect(x, y, w, h, r f32, color gx.Color) {
 	ctx.use_color_shader(color)
-	mut vertices := []f32
+	mut vertices := []f32{}
 	segments := 6 + int(r / 8)
 
 	// Create a rounded rectangle using a triangle fan mesh.
@@ -467,7 +465,7 @@ pub fn (ctx &GG) draw_rounded_rect(x, y, w, h, r f32, color gx.Color) {
 
 pub fn (ctx &GG) draw_empty_rounded_rect(x, y, w, h, r f32, color gx.Color) {
 	ctx.use_color_shader(color)
-	mut vertices := []f32
+	mut vertices := []f32{}
 	segments := 6 + int(r / 8)
 
 	vertices << arc_vertices(x + w - r, y + h - r, r, 0, 90, segments)

vlib/gg/utils.v

@@ -1,13 +1,11 @@
 module gg
 
-import (
-	gl
-	gx
-	math
-)
+import gl
+import gx
+import math
 
 fn arc_vertices(x, y, r, start_angle, end_angle f32, segments int) []f32 {
-	mut vertices := []f32
+	mut vertices := []f32{}
 	start_rads := start_angle * 0.0174533 // deg -> rad approx
 	end_rads := end_angle * 0.0174533
 	increment := (end_rads - start_rads) / segments

vlib/math/math.v

@@ -115,7 +115,7 @@ pub fn digits(_n, base int) []int {
 		sign = -1
 		n = -n
 	}
-	mut res := []int
+	mut res := []int{}
 	for n != 0 {
 		res << (n % base) * sign
 		n /= base