all: ~500 more byte=>u8

vlib/sokol/sapp/sapp_structs.c.v

@@ -37,7 +37,7 @@ pub:
 	frame_cb   fn ()
 	cleanup_cb fn ()
 	event_cb   fn (&Event) //&sapp_event)
-	fail_cb    fn (&byte)
+	fail_cb    fn (&u8)
 
 	user_data           voidptr // these are the user-provided callbacks with user data
 	init_userdata_cb    fn (voidptr)

vlib/sokol/sapp/sapp_v.c.v

@@ -45,7 +45,7 @@ pub fn screenshot_png(path string) ? {
 }
 
 // write_rgba_to_ppm writes `pixels` data in RGBA format to PPM3 format.
-fn write_rgba_to_ppm(path string, w int, h int, components int, pixels &byte) ? {
+fn write_rgba_to_ppm(path string, w int, h int, components int, pixels &u8) ? {
 	mut f_out := os.create(path) ?
 	defer {
 		f_out.close()

vlib/sokol/sapp/screenshot.c.v

@@ -6,7 +6,7 @@ pub struct Screenshot {
 	height int
 	size   int
 mut:
-	pixels &byte
+	pixels &u8
 }
 
 [manualfree]