small change to image resizing

src/model_rgb_ascii.rs

@@ -1,29 +1,13 @@
-
-pub struct RGB {
-    pub r: u8,
-    pub g: u8,
-    pub b: u8,
-}
-
 pub struct Ascii {
     pub char: char,
-    pub rgb: RGB,
+    pub rgb: [u8; 3],
 }
 
-
 impl Ascii {
-    fn _new(char: char, r: u8, g: u8, b: u8) -> Self {
+    pub fn new(ch: u8, r: u8, g: u8, b: u8) -> Self {
         Ascii {
-            char,
-            rgb: RGB {
-                r,
-                g,
-                b,
-            },
+            char: char::from(ch),
+            rgb: [r, g, b],
         }
     }
-
-    pub fn new(ch: u8, r: u8, g: u8, b: u8) -> Self {
-        Self::_new(char::from(ch), r, g, b)
-    }
 }