add From and Into for Rect on ll::SDL_Rect

src/sdl2/rect.rs

@@ -453,12 +453,24 @@ impl DerefMut for Rect {
     }
 }
 
+impl Into<ll::SDL_Rect> for Rect {
+    fn into(self) -> ll::SDL_Rect {
+        self.raw
+    }
+}
+
 impl Into<(i32, i32, u32, u32)> for Rect {
     fn into(self) -> (i32, i32, u32, u32) {
         (self.raw.x, self.raw.y, self.raw.w as u32, self.raw.h as u32)
     }
 }
 
+impl From<ll::SDL_Rect> for Rect {
+    fn from(raw: ll::SDL_Rect) -> Rect {
+        Rect { raw: raw }
+    }
+}
+
 impl From<(i32, i32, u32, u32)> for Rect {
     fn from((x, y, width, height): (i32, i32, u32, u32)) -> Rect {
         Rect::new(x, y, width, height)