gg: handle bad image index

vlib/gg/image.v

@@ -108,6 +108,10 @@ pub fn (mut img Image) init_sokol_image() &Image {
 }
 
 pub fn (ctx &Context) draw_image(x, y, width, height f32, img_ &Image) {
+	if img_.id >= ctx.image_cache.len {
+		eprintln('gg: draw_image() bad img id $img_.id (img cache len = $ctx.image_cache.len)')
+		return
+	}
 	img := ctx.image_cache[img_.id] // fetch the image from cache
 	if !img.simg_ok {
 		return

vlib/net/html/tag.v

@@ -7,12 +7,13 @@ enum CloseTagType {
 
 [ref_only]
 pub struct Tag {
-mut:
-	name               string = ''
-	attributes         map[string]string // attributes will be like map[name]value
-	last_attribute     string = ''
-	content            string = ''
+pub mut:
+	name               string
+	content            string
 	children           []&Tag
+mut:
+	attributes         map[string]string // attributes will be like map[name]value
+	last_attribute     string
 	parent             &Tag = C.NULL
 	position_in_parent int = 0
 	closed             bool = false